Playing with Builds: Readiness

I know all the Cataclysm stuff is way too early to talk about.  I'm confused by one item.  Readiness is still in a prime location on the Marksman tree.  It instantly removes the cooldowns of all your abilities except for BW.  Well, that's nice.  Except only a few shots have cooldowns.

In the current model, a hunter would blow all his big shots and then hit readiness and blow them all again. 

In the new model, a hunter blows two big shots requiring 50 focus each and then he's at zero focus.  He hits readiness and can't do anything anyway.