Queued as a lvl 11 healer for Esseles last night. After 30 minutes, the queue popped up and one DPS did not accept, so I went back into the queue. It never popped up again before I logged off after another 30 minutes.
Ninja while you can, because when you get to the endgame and pull that in an Op, you'll be blacklisted. I hope BW implements server transfers soon. You're going to need them.
I don't think there are vendors that sell color crystals, but people who take the Artifice crew skill can craft them. You can probably find some for sale on the GTN auction house (search under Item Modifcation: Color Crystals).
I'm not sure, I don't have that companion. But if you open your codex (press L for quest log and then choose the Codex tab), you can see your companions' info under Persons of Note. It will tell you what stats are important.
The right-click seems to do whatever is bound to the first slot of your action bar (the "1" slot). Originally this is your basic free attack, but if you put something else there, that's what right-click will do.