The idea was actually to beef up the basic attacks so they are about the same as the at-wills, this making players who want to ue them as primary attacks not gimped.
You probably want to call it a separate "at-will" though rather than modify the basic attacks directly, because if you modify basic attacks you also beef up lots of other stuff, like AOs and Commander's Strike, that there's no particular reason to beef up.
You probably want to call it a separate "at-will" though rather than modify the basic attacks directly, because if you modify basic attacks you also beef up lots of other stuff, like AOs and Commander's Strike, that there's no particular reason to beef up.