That's too many.
Actually, while I am a huge Universal fan, I think mixing it up is needed. If FNF is exactly like Kong there is going to be public backlash. Just from my rides on Kong today I heard a number of guests saying things like. "Another movie ride." Or "do they make rides without screens?"
The public is starting to notice. It's only going to get worse if things don't change.
I'm still hoping for a faster vehicle for Furious too.