Biggest reason that I don’t want Bush to run is that I believe the same thing will happen as the last election. Romney was the only moderate/liberal Republican against a field of four or five more conservatives. Unless the conservative bloc coalesces rapidly to one good conservative candidate, Bush will win the primaries running away while the four-five candidates knock each other out. Bush would easily garner 30% of the vote like Romney did during the primaries...just enough to win a whole slew of primaries along the way.
As long as Jeb doesn’t have a picture of him sitting on the couch with a liberal - that WILL BE good enough for the non thinking, easily led fearful voters and no one will be able to knock any sense into them.