I've always hoped that Miller can be better than Dubinsky, whom I consider a solid 2nd line player, but not a high level one. No knock on Dubi, as he was drafted to be a 4th-line pest (remember his post-draft growth spurt?), but I've always thought of him as the kind of player who makes the absolute most out of what he has.
Miller, to my mind, is a better skater and better stickhandler - if he can match Dubi's determination, he still could pan out to be a borderline 1st liner. It's a tall order, though.
I remember Dubinsky when he came up looking a lot like Miller. Good stickhandling but a lack of production. But after his first call up he did well playing with Jagr. The guy really did have good stickhandling skills. Miller seems like he's a faster version. I'm not sure if his stickhandling skills are better though. I think he like Jagr also tried to do too much. I really liked Millers goal on Rask though who is possibly the best goalie in the NHL this year. One thing Miller unequivocally has over Kreider is stick handling.