One feature I am missing that was incorporated into the INS2014 is the automatic extra supply point per extra round. This allowed me to experiment with different loadouts & tactics, and also to counter the other teams tactics more effectively. I propose that adding this feature back in would increase the fun and shelf life of the game for many.
I also really liked in DOI the ability to gain extra supply based on objective capturing and combined kills/injuries. The latter option might be too OP for Sandstorm, and it would reward Gunners, Demolitions, Commanders and Observers in an unbalanced way, but what do you all think about 1 extra SP for the first objective captured, and maybe toying with an extra SP for the first 5 enemies killed who are inside an objective, or shooting from within an objective. This last feature would provide more incentive for players to play the objective.