^ As long as Hank didnt look like the cowerdly blue lion I really did not have a problem with his change and really without the subplot for him he would have had no lines. That subplot also gave Mystique her impetus to change sides.
I thought he looked like the blue guy from Monsters, Inc.
I don't know if he was partly CGI or what, but it looked like it. I think he looked pretty ridiculous.
I see what you are saying, but I think they could have found something for him to do. They could have had the subplot without having him change, and thus still have the reasons for her to go with Magneto.
Hell, she would have had a better reason to go if Hank were normal looking. With him changed at least she has someone she can relate to on the team.