Oof this is a spicy thread with lots of arguments so I'll just keep my suggestions minor.
Reduce NTEC's mag capacity by 6 bullets (from 32 to 26). Thats one full kill, just makes it less spamable. I think big changes can mess things up royally for the most used gun (excluding STAR) for players in the game.
HVR on the other hand needs to be less versatile and only good for range. Increase equip time. Absolutely kill it's accuracy when jumping and moving. Reduce FOV greatly. Maybe a damage ramp up as in, less damage in CQC and return to full damage after a certain point. Maybe less damage in total to 750 instead.
I don't know, obviously not all of those nerfs but any combination of two or three of those. Right now its just such a beast for teams and a meme for CQC, right now it's still surprisingly good at <20m with jump shots and the like. Tapping crouch should not instantly grant you 100% accuracy.
Being rushed as a sniper should mean death to you, or require you to fully commit to your secondary or have a team mate assist. Not have you go, lol PAP *switch* and insta LUL on the rusher with an instant accurate 850 damage truck.
Also replying to the post above -
In those games snipers have other downsides, like having a really low FOV, gun sway, the sniper bullet being a projectile, the sniper being rare in some BR games, I mean in games's like counter strike they have multiple downsides to snipers. Low FOV, terrible no scope accuracy, slow movement, High cost so if you buy it and lose the round and the gun, you've lost a major investment and you're possibly useless for another round or two.
In a game like APB, you just equip it and well, piss.