I don't think a rematch is an option the Khan camp would pursue - Maidana is as tough as they come and not the kind of fight you want on a regular basis. The winner of Bradley/Alexander in the summer and then a move up to 147 where they will probably go straight for Mayweather - Roach believes both Pacquiao and Khan can beat him and you suspect he can't wait to get either of them a shot.
As for DeGale, you would expect anyone with big ambitions to dispose of a domestic plodder like Smith. That said he wasn't hurting Smith much, he was very scruffy close up and he has a slappy, unimpressive punching style that reminds me a bit of Calzaghe - he was clearly outboxing Smith but the ref stopped it way too early IMO. Lots to work on but he's got a lot of talent too.
The rest of the British card was poor, Brook's opponent looked hopeless even before the bell started, Macklin and Cleverly both should have done better although both had troubled build-ups. Bellew and McKenzie at the end was by far the most entertaining fight on the Liverpool bill, don't think either of them regard defence too highly.