@Reyn,
I see your point. I wouldn't have liked it if Russell had beaten Matt in their duel, but then again, someone else might have defeated Russell so he'd have gone home anyway. Not to sound unkind, but RI was worth it just to see the bad man cry.
(Oh, and I don't believe for one minute that Russell has played his last Survivor).
Matt is back at RI because of his own doing, IMO. Post-merge, it's a numbers game and Omatepe couldn't risk him flipping and taking Andrea with him. Didn't Matt himself admit he's not very good at the game of Survivor? Mentally, I mean.