Same question: does this do anything in single player custom games?

Predatore production cost buff reverted.
Monk production cost nerf reverted.

What changed in the 28 May update? There's no change notes.

I can sympathize with that. I'd prefer to buff them in some other way, but I'll consider giving them 1 more point of movement.

Well... okay, I'll give it a rest. Feels like you nerfed the function of the 2 weakest flyers as scouts too much - but I might be wrong, so lets leave it at that.

Probably yeah, though I'm not inclined to change it myself unless more people request it. Improved movement is still worth more on a flying unit. This nerf was requested by the MP discord.

I see. Are there any other ways to increase their movement, beside the "Improved Movement" effect? Cause for cheap scouts, like they are, out-of-combat movement is an actual concern.

Sure, that's possible. The issue is they can get higher levels of improved movement from the necklace accessory. If I don't give them the highest available through equipment from the start, then they'll be in a weird place, and having improved movement 3 from the start is a bit much. That's why I gave them fast 2 instead. Their battle effectiveness was more of the issue anyway.

Hmm... I get that. Is it possible to give Wyverns/Arpujas improved movement? Basically, nerf all fliers but those two. Adding Improved Movement does have small implications on their stats and frees up a trinket slot on them, so it might not be that easy...
Monks and Mysts seem like the strongest(on a cost ratio) regarding flying units anyway.
Eneqa, Daemons, Ended and Scythers all have more of a combat than a scout role(They are all "heavy" units). So I agree on the nerf on them.
Necrodone is kinda in-between. It's the Necros only "scout" unit, but they definitely are really strong, so... A nerf shouldn't hurt too much.

Most cavalry does seem weak. Golem Riders are actually good, so guess thats the only strong Major cavalry. Arguably, Fanatics are good cause of the Quest Trinket. Gorgons and Seekers don't seem that bad. The former are just in a weak faction while the latter get overshadowed by Monks.

Thanks for the response.

That's all true, but...

All the factions with flying units besides Drakken are considered top-tier/overpowered.

Monks, Mysts, Eneqa Wings, Necrodrones, Daemons, Ended, and Scythers are the best units in the game.

Monks and Mysts are dirt cheap for what you get.

Wyverns and Arpujas were most affected and they received buffs to compensate (they weren't used before anyway).

Eneqa Wings and Ended received improvements as well, as the most expensive units.

Further, the best cavalry units are minor faction units. Cavalry units are generally the least used of the major faction units.

Additionally, due to the way the battle mechanics work, a smaller amount of stronger units is usually better than a larger number of weaker units.

Lastly, this change is pretty small in the scheme of their overall effectiveness. They can move faster than cavalry over difficult terrain, see over and cross ridges, and they're still better units to begin with.

... and yes, it's compatible with ELCP

I assume it is compatible with ELCP?

Looks good so far, most of the changes really seem like QoL changes that have very little impact on balance... And I always like some QoL.

The ones that actually affect power look pretty good.

However, regarding the blanket change on flying units, I am unsure.
On paper, flying > Cavalry. However, their core strengths are not all that is to them. Individual stats, abilities and equipment, as well as what kind of enemies you are fighting differentiate the flyers and cavalry quite a lot. It could be argued that most cavalry is just too weak or that flyers are just OP, but you'd need to target individual units for that and not the whole class.
Furthermore, Flyers are rarer than Cavalries and, usually, Cavalries are inexpensive, while most flyers are actually very expensive, with most of the cheaper flyers being Major Faction specific(so being a unique strength of the factions that have them).