Grenades
Feel good for the most part especially with only having a single class with grenades to cut down on spam. Adding in the character with the grenade launcher may change things however.
Proxy Mines - same as above.
Hitboxes
Feels like when sniping the hit boxes are a bit behind the character itself when they are running, resulting in very easy headshots even when it appears you miss, verified with OBS recordings in slow-motion. Other than that - A-OK!
Guns in general feel great, the aiming is smooth and the time to kill and damage of weapons are balanced I believe.
Shotguns are the only exception - mid/long range they should definitely do damage, but the spread does not seem to be as large as it should be, and in turn they are almost too effective at longer distances because the spread is not expanding as it should? In its odd Star-like pattern or whatever that is called internally 
Damage Drop off - I could go on for days about this part of the game. With guns a headshot from 1m away should do the same damage as a headshot from 1000m away. It honestly makes very little logical sense as well that a player can take 5+ headshots at long distance and still have any health at all left over. When long range aiming tends to be harder than mid range, it should not be penalized.
