He isn't going to be in the last two really so this is his ONLY chance to make his mark. So to speak.
I mean Draco is barely in the book of Deathly Hallows so he'll be lucky to get one scene in the film.
I used to really like Tom Felton - I think he was a very intuitive actor as a child.
I rather dislike him as a person as an adult - and since he only does tacky horror films when he isn't doing HP I can't really judge on his adult acting.