A brief catalogue of my own personal suggestions for the mod:

• Remove AK-104 (It's almost identical to the AKM Custom and uses exactly the same textures as the AKM Custom and AK74m)
• Distinguishable textures between AK-12 and AK-15
• AKS-74U and AK-74 texture color changes
• Distinguishable textures between AKM Custom and AK74m
• AKM Color changes
• FN2000 name correction to F2000 (The official name is FN F2000)
• AK74m name change to AK74 Custom to be consistent with AKM Custom
• Banshee remodel
• MAT-49 remodel
• Remove the stock from several models such as the AR15 platform guns (M16A2, M4A4, M4A1) and make them attachments
• M4A1s name correction to M4A1 (M4A1s is a CS:GO reference. The gun in this mod does not have a silencer on it so it's a normal M4A1. Changing the name would also make it less obvious that several of the guns are inspired from CS:GO and give the mod a more diverse feel)
• AKS-74U remove attachment slot and give it its signature stock, give it a muzzle booster and remove the muzzle slot

I'll just quickly go over this.

Remove AK-104

I think we should just keep it at this point. It's already in the mod anyway. Removing it entirely might hurt more than keeping it.

Distinguishable textures between AK-12 and AK-15
AKS-74U and AK-74 texture color changes
Distinguishable textures between AKM Custom and AK74m
AKM Color changes

Between you and the author :)

FN2000 name correction to F2000 (The official name is FN F2000)

Sure. I can just change the name in the translation file.

AK74m name change to AK74 Custom to be consistent with AKM Custom

Not entirely sure, but we can change the name in the translation for this one too.

Banshee remodel
MAT-49 remodel

Not a big fan of remodels, but we could consider it.

Remove the stock from several models such as the AR15 platform guns (M16A2, M4A4, M4A1) and make them attachments

Not a bad idea (if the author is also okay with this). Though one attachment for all AR15's would be preferred in this case (if possible)

M4A1s name correction to M4A1

If I can make sure this doesn't break compatibility with previous versions, sure.

AKS-74U remove attachment slot and give it its signature stock, give it a muzzle booster and remove the muzzle slot

Probably no. This guns seems popular among users because it can have custom stocks. Removing that ability might upset some people.