Although Im not satisfied with it either, I feel like i have to defend K2's ending. The idea is that the ending is everything that takes place from the battle of Telos to the final confrontation on Malachor, with that in mind it aint bad. In terms of closure though, its a disaster to "fade to black" without even having a final chat with your party members.
But if I was a dev, Id rather cut things from the middle of the game rather than skimp out on the ending, which seems to be standard procedure..