Weapon LVL upgrades

So there are a few, not all, FT weapons that have various extra lvl upgradability with no extra add-on/features. If anyone sees the point, maybe its just the game devs thinking ahead, but it is useless right now. Like the 2XL handgun. No extras for getting it up to lvl 4.
I expect at least a tiny bit of upgrade like responsiveness, reduced recoil or genereally each weapon’s last lvl should include the ability to get something. not nothing.
not ranting. Just think the system should have more polish and shine.

I also noted once that the term LVL shouldn’t be used. Rather, PWR should be used. Because in game UI terms are easily misrepresented. NOt sure how it is in other games, but when there are two characters to master, it tends to get granular with the details.