Considering we'll be taking a lot of feats without knowing how they work in practice until we've experimented with them, I think it would be nice if there was an option change your past feat choices at each level up or something along those lines. Would be nice for once not to have to fiddle with the console if you make choices you regret - which I inevitably ended up doing in Fallout 3 and NV.
Perhaps option to change appearance as well - I don't understand why these kind of options are excluded from so many more recent RPGs(was particularly bad in Mass Effect games due to un-skip-able lengthy intros) since I remember games as far back as NWN having them.