Absolutely.
But to a large degree, this is an empiric question.
The "it has to be equal IF you offer it" clause MAY be a disaster. It might cause folks to have their mental health coverage dropped in droves entirely. But it will likely simply drive prices up, as all insurance mandates do (empirically speaking--look at data for states with mandatory auto insurance vs ones that do not before and after the mandates).
I would expect for most people this is a symbolic victory, and for the small subset of privately well-insured people who max out their mental health benefits, this bill is awesome.
Anyone who tells you "X is gonna happen" as a result of this bill is as FOS as a methadone patient who won't take his colace.