Personally I'm quite disappointed with how little meaningful interactions you have with your companions/partner in Act3 given how much there is in Acts 1 & 2, there isn't much that happens in Act 3 that feels like it's meaningful e.g. the almost utter lack of reaction to killing the other two bosses.
I'd expected at least some group interactions after each fight - and pre the final fight I'd expected some meaningful interaction with my partner given we were heading into a fight where we stood a good chance of dying.
I've said elsewhere that Act 3 should have been split into 3.
And the epilogues - pah they're just weak.
It's hard to call them epilogues if they are just few words shared with companions before the game fades to black. With Lae'Zel it's passable, especially if you romanced her (I don't see any other option, she's way too perfect) but with others it goes from pathetic to none existant. But hey, it's GOTY candidate, right?