On the tiers > On the 5's.
Bonus effect, even minor > no bonus effect at all.
Class with focus on weapon OR implement > class which needs both.
So yeah, it exists. But there's a reason I gave out Expertise for free in the past, and have stopped giving it for free now. The old expertise feats were simple math patches. The new ones are math patches with style.
Needing separate weapons and implements isn't beneficial at all - it's been a class handicap from the beginning of 4e, usually due to an extra magic item tax. Needing to take two expertise feats, or a poor cousin to the new expertise feats, because a class has mixed weapons and implements is a mechanically unjustified oddity. Unless you're going to argue that swordmages were so powerful they needed to be kept down in comparison to other classes?
-O