A few suggestions

-Custom or more transparency of the objective markers When looking from one objective to another or approaching capture points in conquest the A B C D E markers will often times obscure targets on the other side. Would be nice to be able to make the objective markers smaller or hide when the player is looking directly at the marker. Sliding scale in settings or by default.

-Revivals from medics providing a ticket back for the team reviving/removing kill/death from scoreboard.

-Reduction of accuracy/screen blur when under suppressive fire from opposing team along with potential perk to reduce debuff.

-Squad leader ability to mark objectives by pointing index finger with at objective markers when no weapon is in hand.

-Removing map voting/providing alternate rotation or field test only maps to provide more variation and less map repetition.

-Capture the flag game mode either traditional with each team having a flag to protect and steal from opposing team
OR
a single objective (intel) from a location on the map and then bring package to a secondary location to extract using the palm arm/disarm mechanic from Rush or back to HQ to secure points.