As much as I like Monica, very few heroes can hold a long term ongoing if they are hand to hand fighters. People like heroes who can haul of and punch, kick whatnot. Even though Monica and hold her own hand to hand, one has only to look at Dr. Strange who at times is given some martial art skills; it aint enough. Storm would have the same problem because while she punch and kick like some other martial artists, that isn't what she is known for.
Not to say it is impossible, just hard.