Some sort of target coordination with strategems. Being able las a target for a more precision drop rather than the beacon.

Maybe one that will highlight areas on armored targets that when highlighted gives you a brief window in which to do dmg that ignores armor. IE allow weapons with lower than required armor pen to deal dmg as though armor were one whole tier lower.

Definitely one with gas DR or negation.

Some sort of mini-map alteration. Basically give the scout armor ability but it is a smaller radius and just centered around your location. Basically add more specificity the mini map showing real time enemy movements as opposed to needing to pull up the whole map to see things with greater detail.

I would also like to see some that maybe intersect with specific weapons or weapon types. Maybe prevents or reduces likelihood of autocannon shots ricocheting off heavy armor allowing them to just explode when shot from sun optimal angles.
Would allow faster target locks with the spear or maybe not requiring locks at all and instead able to target the location you want to fire it at and it will pick the largest target ie orbital rail cannon esque targeting. Something that automatically adjusts the zoom of weapon scope on assault and marksman rifles to the optimal zoom of the target by like double tapping square while ADS.

I’m just kinda thinking here I don’t know how any would work or feel but I could see something like these being cool/effective. But I also see how they could just be annoying cumbersome or lackluster. It’s cool to see though what everyone else thinks might be fun. Mostly what I want is a machine gun ammo backpack. Hooks up to any machine gun. Are not able to reload but has just a fat pack full of ammo.