Hmm, it's true that the loss of prime shot is deeply felt in some builds. Still, toughness and quickdraw on their own are each better than defensive mobility, which now that battle caster defense exists I certainly would NOT "take eventually anyway." I especially like the hunter option: take the new melee at-will that uses dex and use it when you're cornered. I'd much rather do that than eat OA's, +2 to AC or no.