The first thing I like to see added is a report player option while in the party. (not sure if it's in there already, if so please let me know)
the second thing is my Wife and I like to party together and we'd like to be able to give commendations out the people we get paired with (Sometimes they deserve it) but since we party together a lot we can't, but have it so if you are in a party with someone you can't give it to the person you joined with.