-No, not even close.
-Qvic(really Txevu), but that's because it's shit by comparison.
-yes? "worth doing" is awfully subjective, and pretty nebulous overall as regards a fun-time activity
CoA BP is a bit of a project. If you're short on regular gear/augs, AAs or flags, doing those things will gain you more overall power per hour invested. This, though, is something a paladin can do basically solo (assuming lv90+ & a bunch of AA, but will be worlds easier/more fun with compatriots) to advance when other things have been checked off or are out of reach.