The other issue, as someone pointed out, is that in the game's assumed economy, keeping two attack items up to par can be fairly tough on your resources.
At the crux of the issue are classes that have both weapon and implement powers and assume or force you to take a mix of both. Since we know that design choice isn't going away any time soon, it would have been nice to see that addressed. Hexblade addressed that issue nicely, but we know they aren't going to go back and change all the old classes.
I do like some of these feats, at least in concept, but the complaints many of the posters here have are valid.