TL;DR: Remove the score column from the scoreboard, use the space to put revives/vehicle destroys/spots/objectives fulfilled/transports/etc. (just listing possibilities, not saying I want all of them) there, so that players with unique contributions could be recognized.
Reasoning:
Scores are useful for sorting players, but their values make almost no sense to players. If we see a 0-5 but 100000+ score player topping the board, we know they must have done something impressive but we are not sure why. So why not just use the score for internal sorting, and show exactly what a player has done on the board?
I sometimes am proud of destroying many vehicles risking my life using C4 and RPGs, regaining control of one objective again and again in one game, or keeping flying and land troops on the roof, but I don't think a single score can reflect them well.