Afghan Talibans aren't interested by Pakistan at all; for TTP, their whole propaganda is based on American attacks, and other sympathetic things, so if America departs, TTP will perhaps still be there, but with no more local support, as peoples are actually fighting in order to revenge their lost lives.
So Pakistan shouldn't attack the Afghan Taliban and/or the so called 'Haqqani network', as it would just create more enmity. We can deal with the TTP latter, in all serenity.
So wait...the Taliban's excuse is to attack Pakistan because American troops are in AFGHANISTAN? How about all the Taliban should go to Afghanistan to fight instead of attacking Pakistan eh? Does that make common sense? Or does the Taliban have another motive? Did people forget to read my post about the Swat Valley fiasco when the Taliban try to expand?