Mudra lag, positioning, shortest GCD and on top of it we're supposed to support others with Goad and the new aggro decrease ability (the latter of which sounds useless for most relevant content, if aggro management stays as it is nowadays). In the meantime, MNK and DRG get actually new and seemingly very useful and strong mechanics.

I sure hope there's some amazing stuff coming for Ninja they just didn't bother mentioning, but from the live letter, the changes for Nin seemed to be a very sad joke in comparison to DRG and MNK.
From the way it sounded, we'll end up having the hardest class with the lowest DPS as far as melees are concerned. I just hope it won't really end up being that way.