Mostly just a few minor issues id like to address.

1.First and the most aggrivating is the readdition of unscoping when shot at. Combined with the faster and more or less breakneck campaign speed it feels like im hitting several repeated speedbumps, ESPECIALLY against crawlers. I can see a reason why this was added, to be more close to the original halos, but here with the new stuff it doesnt pan out well.

2.The "new" models and lighting changes are more harm than help here unfortunately, in some places it looks great while in the darker sections it just looks unlit and/or flat as a result, and vanilla h4 has no flashlight so these dark areas are a mild pain. Not to mention a few minor lighting bugs which just dont look nice.
Especially the cortana model here, it lacks the alpha value so it just looks borderline no normals kinda flat. Yes i have my graphics on enhanced, yes it still looks ugly.

3.Sounds could use a general tone down to match the volume of the other sounds, the energy sword especially scared me half to death when putting it away because of how loud and in my right ear it was.

4.While i like the addition of more ammo capacity, theres not nearly enough in the levels themselves to ever reach it, so the large ammo pool doesnt fix issues ive had in vanilla campaign where it feels like im going to covenant weapons for neccessity only to go to human or promethean weapons right after and bearely get by. Just feels like a bandaid fix, and the pistl start levels of ammo you start with doesnt help.

5.Promethean weapon swap animations have a weird bug of not shooting till about a second after theyre done, kinda annoying. Makes them fee sluggish.

And now a few things i like.

1.The infinite sprint and increased speed combined with better dialogue choices for whats unspoken and such really give the game a much brisker pace to it, felt like i was flying through missions compared to vanilla campaign where i was surprised i got the par time on.

2.Somehow you made prometheans less tankier, thank god. And the ability to 2 shot a watcher is a blessing. Certainly makes the combat feel a lot better and a lot less "i threw 4 grenades at him and he wont die".

3.The increased ammo capacity is very well felt on the human weapons, making their sparse appearances last a lot longer than the end of the room among other things like the extra grenade. That extra grenade goes a long way.

4.Encounters definitely seem a lot better balanced, for the most part. Promethean encounters still feel large but manageable. Covenant encounters feel much more fine tuned, but i did encounter a minor bug where the game forgot about an entire enemy squads existence for a trigger on the cartographer. Other than that, seamless.

5.The pistol slaps, Nuff said. Somehow even punchier than h4's. Bit odd to only start with it and then get the assault rifle but just odd is all.