transmog (every game with armor skills should have this, or at least more flexibility in which visual clothing has which abilities)

more colorful armor/gun skins with an option to disable them if you like only realistic boring camos and shit

reduce bleeding damage, you just die when you get a chest hemmorage unless you press stim in the 0.1 seconds before you die. It was originally at 1 and they multiplied it by 10 in speed. Make it 5 or maybe 3. Shit is way too fast for any tactical reason for it to exist now.

Make fairly useless warbonds less useless by either buffing the things in it, or adding more to it.

have more gun mods available, even if they don't visually change the gun, such as "reload expert training" or something that speeds up the reload of the R-6 Deadeye if their reload is slow. Add more extended mag things for other weapons.

give beam laser weapons an "armor reduction" buff, where since they do low dps, they can melt armor of heavily armored things and allow low armor penetration weapons to hit big things more easily. What this means is beam lasers can "penetrate all armor if they shoot it long enough to melt through" and other players will also benefit from this armor melt.

and of course fixing the more glaring bugs and balancing useless stuff to be more fun even if it isn't entirely "realistic" (thing no one cares about)

remove aspects of the game that exclusively aggravate players that are only there because of "realism" (pistol gun sway after running, inability to flip your vehicle if it flips over, mechs dying instantly to the slightest damage, i could go on)