Crazy Jerome
First Post
As a quick hack, I've wondered if 4e would be improved if all characters had a fixed ability modifier for attack rolls in their primary class (or classes in a hybrid design), while damage bonuses, effect bonuses and multi-class attacks depended on the ability scores as normal.
A slightly different version of the same idea is that the bonus to hit from ability scores don't stack with anything else. Depending upon how you then scale abilities and provide options for other ways to become "highly skilled," you get an interesting dynamic as characters decide whether to "outgrow" their natural talent or not. If it is going to take you, say, three feats to develop your Athletics skill enough to beat out your Athletics talent, you might decide not to.

You'd have to be careful with ability scaling, though.