This is being done specifically so the IDF can go back in in a better strategic situation. When the IDF goes in now, they are a police force attacking subjects in "conquered" territory. When the go in in the future, they will be an army responding to invasion by another nation. It's a far better position to be in...
You could be right.
Personaly I'd like to see Abbas "do something" about terrorism in the PA. But He can't, and I suspect he doesn't really want to. The problem with the PA is by this stage of the game anyone who wants too make peace with Israel is at room temp., and has been for a while now.