Still not sure what weight he should fight in. He's not going to do anything at Welterweight unless he seriously improves. Should consider moving up to Light Middleweight, chance to pick up a world title or two.
Depends whether he wants to be in the world title mix right away, or if he wants more improvement. I think there's a lot more depth at WW, he's got Brook, Khan, Broner, Porter, (Danny) Garcia etc. But he won't beat any of the champions.
154 is a bit shit so more chance of a title, but not as many good fights.