This addon is quite fun on the right maps, but unfortunately comes with a few problems to boot though. This is a comprehensive list of things the addon desperately needs fixed/added in my opinion from using it since before this superior + version was made.

COLLISIONS(Addition)
One issue is that multiple npcs will often try to navigate to the player in the exact same route (such as on bigcity) resulting in them getting stuck behind whoever is the slowest npc. Could we please have an option for all npcs to have collisions disabled with each other to avoid this? It's quite a bummer when you have a bunch of fast npcs all grinding to a screeching halt because a much slower npc is in front of them, and can seriously jam up the pace of an npc invasion rush.

CHASE PLAYERS(Fix)
Chase Players as an option is sort of broken. If you check it off it just makes the npcs walk to where the player was upon that npc spawning, and they will completely ignore the player and all other entities of interest until they reach that destination. You can walk right by them or even stand in front of them, they just go around you to get to that location. I have discovered, however, that if you enable chase players temporarily for about 7 seconds, then turn it back off, it updates their knowledge of your whereabouts without overriding their natural behaviors, and they come to you immediately as though they have discovered your location and are aggro'd to you like normal. They will change directions based on where you go, they follow as they should, etc etc. Can you please touch up Chase Players so that it functions like an all-encompassing aggro at all times? This is a pretty mandatory option for things like zombie survival usage of the addon. It's pretty lame when the horde walks right by, even ignoring being attacked or killed by you simply because they are on their way towards where you were 40 seconds ago.

SPEED MODIFIER(Addition)
Regarding modifiers, can we PLEASE get a speed modifier feature? We have a damage modifier, we have a size modifier, can we please get a speed modifier? The closest thing to a speed buff is simply the usage of the model scaler, which makes them move faster due to being larger, however it does not speed up any of their animations, such as attacks. Is it plausible to add a speed modifier that encompasses all of the actions the npc can do? This would allow for things like melee-oriented npcs to be able to immediately attack you upon being close enough without the chance of the player avoiding damage 100% of the time simply by running in the opposite direction?

STUCK EDITOR MEMORY(Fix)
It also seems the addon can glitch quite easily and not actually update the spawn editor information. I've had plenty of instances where I add a new npc to a spawn editor, or change profiles all together, and it still will only spawn what I had previously inputted when ZINV was turned on. It required a full-blown map change in order to finally obey the most recent variables in the spawn editor. Can you please check that so it updates the moment the spawn editor is closed or something at least?

NPC BEHAVIOR(Addition)
Not sure if it's possible, but is there any way we could get spawned npc behavior we can specify? For instance, can we have npcs to patrol in a small area of where they spawned? Can we have npcs roam, and select random areas of the map to move towards at random times to increase the chances of locating a player in a large map? I know that some VJ Base npcs already have a built-in wander feature, but it's garbage, and the npcs only move a few feet in a random direction every so often, resulting in them making no actual progress towards a destination, and more acting as a pointless 'active-appearing' gimmick with no value to it.
Can we get npcs that only turn aggressive if attacked, allowing other npcs to follow suit, much like a hive mind? Perhaps just achieve this by utilizing the ignore player feature, but then immediately shutting it off and turning Chase Players (in a fixed state) on upon any of the spawned npcs taking damage? Can we get npcs that are afraid of the player and run away upon noticing them? (Or running away at all times if Chase Players is toggled on, resulting in a game of hide-and-seek?) Npc behavior based on relationship to player as well as navigation decisions would be fantastic, as I'm pretty sure those are the two things this addon can in fact change, even with vj base npcs, which I know for a fact cannot accept squad changes, preventing some vj base npcs from reacting when their friends have an interaction elsewhere in the map, even though a squad feature is meant to allow exactly this.

NPC DROPS(Addition)
I noticed the exploding npcs option, and was wondering if we could also get an elaboration on that? Could we have npcs that do other things upon dying? Can we have them drop/spawn a specified entity, or multiple specified entities, such as a health kit or ammo or armor or any entity name the player chooses? Giving this utility to the player could also allow for really interesting combinations, such as an npc spawning several other npcs upon dying, allowing us to get more creative. And speaking of spawnable entities...

NON-NPC SPAWNING SUPPORT(Addition)
Lastly, can we please get non-npc spawning support? Replicator melon, for example, is a hoot of an addon that allows you to spawn melons which turn whatever they touch into another replicator melon, and will actively move towards a potential target, be it prop, npc, or player. When they get into large enough numbers, they move much faster, and in dedicated swarms, easily taking flight in bigger numbers. You have no idea how disappointed I was to realize I couldn't simply cheat the functionality of the addon by forcing it to try and spawn entities other than an npc. It just raises an error in console complaining about a lack of "npc_info" and refuses to spawn it. Could we please get a feature or box-check or just the removal of the spawn-denial functionality for entities that don't qualify as npcs? It would sure make things like my example way more fun, where you are moving through a large map like bigcity, and actively being hunted by instant-death replicator melon swarms that could be literally anywhere for all you know.

This is one of the more malleable and fun addons, especially for people who still choose to mess around in singleplayer garry's mod. Please consider coming back to this and giving it lots of love and attention. It definitely deserves it.