There is no free lunch, you knew exactly what you were getting from Saudis,you wanted Money from them.The Saudis knew exactly what they wanted to do in Pakistan with their Money,that is spreading of Wahabi Ideology.Pakistan is neck deep in it,they cannot go back now, Neither will there be Government control of Madarassas funded by Middle eastern nations.
The aftermath of Peshawar is because, Kids belonging to Army men and officers kids were killed not some poor mans kids,as long as Poor mans dies Army won't care,they will keep playing "Good Taliban,Bad Taliban".
Only when they were directly affected,did they gather resolve to do Zarb-e-Arb(that too is not sure how successful it was).
One Lal Masjid which was small when compared to Zarb-e-Arb, created TTP and many splinter groups,think how many groups will be formed after this Zarb-e-Arb operation is over,the militants will bide time till the heat passes, then they will emerge out of the woodwork.
It's upto Pakistan to decide what is a bigger priority first,
1)Finish the border dispute with India recognize Loc as International Border and have a chance of setting their house in order and live in peace,looking after the welfare of its citizens.
or
2)Continue waging proxy war in India, while suffering setbacks at home from TTP and god knows which other groups in future with the risk of destabilizing its state and lose grip over its provinces.
Their choice.