I just give my commendations to players with good people skills and that can communicate to the party well, I think quite a few other players are the same.

E.g. I ran Dusk Vigil twice yesterday, both times I spoke to the party a little in between pulls and notified them of when I had a good hand saved up and when I would play it. E.g. I've got an AOE Balance card set up, I will pop it 15 seconds after pull so have you CD's ready

Both runs I got all three commendations, there are a lot of good players and yeah they speed up your runs, but the ones who are pleasant and work with you are the ones who make the dungeon fun. That being said I don't always use my commendation, I only give it to players who deserve it or i just don't give it out.