Most MMOs ive played have had some sort of team support tools, these can be the ability of the team leader to set target markers above the heads of the opposing side or NPC to help prioritize or distinguish certain enemy types. There have also been the ability to display a target assist window, where again the leader of the group has the ability to set members of their group as target leaders, this is so everyone in the group is able to see in an instant which person the target leader is currently targetting without the need to click on your teamate. So for example, the group leader sets the either themselves or the most experienced team member as the target leader and instructs the group to fire upon whatever target the target leader is firing upon.
The reason for this is, one it would come in very useful during STFs and Fleet Actions, and two it would be really useful in PvP Matches. Now i know this is a little bias, so forgive me, im not trying to start a flame war, but I am of the opinion that a large part of the reason that PvP matches are won by the Klingons is their/our experience and co-ordination, we already co-ordinate our fire through experience and practice, where many fed players dont. so having these tools may in a small way help reduced those 0-15 matches that both sides find so dull. It would also provide a really good training tool for novice PvPers too.
It would be nice to be able to set both a 'Hostile' target, and a 'Friendly' target.
Hostile actions like shooting and debuffs would go to the Hostile target. And repairs and buffs would go to the Friendly target.
This would also allow a Friendly target to be selected to act as Main Assist. With target of target displayed, all the teammates who have their Friendly selected will see what Hostile they need to shoot at.
There is an assist function in the game. All you have to do is target the group member and all your attacks will go to who that person has targeted.
So for instance, if your cruisers and sci ships all target your dps escort, you can all be focus firing off of his/her target and have them already targeted for buffs, hull and shield repairs.
There is even a secondary assist memory, where if you have targeted a friendly and then moved your target off of them and start engaging another target, your eng team or sci team buff will still hit them. I know everyone has had the misfortune of taking a bunch of fire and popping off a hull heal to see it land on a team mate that is at full health.
I have gotten in the habit of hitting F1 before I pop off a eng or sci team because its happened too many times that I end up wasting an ability on a full health team mate.