I do see a lack of chemistry between the two, and to me, it's all on Evan. Anna is doing everything right, but for all his physical ability and tall presence, I think there's a lack of maturity to his dancing. Either that, or he's simply still not used to performing with a partner. Either way, while he can perform amazing steps within dances, I also spot the same problems where he's too balletic and skater-ish. It's obvious that he's still too much in his head.
Interesting...I went to Evan's Wikipedia page to learn more about his personal life, and I came across an interesting item: Under current Skating Choreographers, there are two names -- Lori Nichol, and Mark Ballas? Is Mark choreographing his skating routines?