Musharraf must stay in his current position. With the anti- US feelings strong due to afghanistan and Iraq, it is very likely that pakistanis may vote for any religious extremist who talks Anti- US, Anti - India and anything that's acceptable to radical islamists. Taliban's growing strong hold in Pakistan is causing worry to everone, especially to US.
Musharraf is the only person (atleast it seems so) who stands between these Talibani devils and those Nuclear weapons. If this guy falls to a bullet some day, it is tough to imagine what would be the consequences !
Pakistan's economy is still in jitters, and it just can't improve till they have political stability. With radical islam again raising its ugly head, political peace in Pakistan seems like a mirage.