Brady was preferable (marginally). Rauner, Dillard, Rutherford... all lousy.
Rutherford wasn’t perfect (Brady is more conservative) but he was the biggest threat to Rauner and has already won statewide.
That’s why the combine unleashed the “scandal” (that he sexually harassed/tried to gay rape some ugly bald democrat) and destroyed him.
If it had just been the democrats alone they would have waited to see if Rutherford won the primary and then unleashed the scandal in September.