The only part I don't like is losing the opportunity attack, because that means they can't flank, negating one of the tactical aspects of the game completely. I really wish I could use that 8 speed for a chance to provide combat advantage.
Mind you, I don't have my books handy, but does not being able to make an OA negate ability to flank? Or am I misreading what you said?
I thought it just needed the ability to attack (period) to flank... no?
Edit: ninjad.