Personaly i would like to see some way to mark enemies before combat. This would make group combat alot easier.
Whenn doing the Cure (for example) it's really hard to manage all of your teammates. Using the tactic of leaving one drone allive at every powernode in front of the gates should be very simple, but once in a while someone doesn't know wich drone he/she is attacking and kills a drone relevant to this strategy.
Also marking the ground for positioning would be nice and it would help save alot of time.