Perhaps you're new to politics, so I'll take a stab at trying to help you out. A Rockefeller Republican (now referred to as a Compassionate Conservative) believes government is the solution, not the problem. They'll support expanded government at every opportunity. While claiming to reduce taxes they'll only reduce the less significant taxes - knowing that it's required in the Republican Party - but will (as quietly as possible) support higher big revenue taxes. While pushing for larger government, and the taxes that inevitably follow, a Rockefeller Republican will be able to pressure Republicans (even conservatives) to support his initiatives. It's a formula for disaster and fiscal profligacy. A Democratic Governor, particularly facing a solidly Republican legislature and Cabinet, won't be able to do much, if anything.
This year, divided government is the best we can do in Florida.