They can't do anything about it really, it's just the awkwardness of our name, as you say, Aston is wider than Villa in terms of tracking/kerning/whatever-the-word-is.
If you look at both of the A's you can see they both come to the same point on the shield, the name is centred. It's why AV or AVFC is simply better from a design point of view, it looks more naturally centred.