I'm not sure Cammalleri has as stong of a supporting cast this year as he did last year. He'll see just as much power play time as he usually does, which is a lot, but I think his numbers may take a slight hit this year until he forms some chemistry with Gomez and Gionta.
As for Semin, his power play time will increase and he'll finally break the 80 point mark this year. He may do it in fewer than 65 games but If he plays a full 82 game schedule, he'll be in the top 10 in scoring hands down. This kid is loaded with talent, but will always be 2nd best to Ovechkin.