IMO, if the fastball is in that range the secondaries have to be really good to absolutely outstanding.
I believe the things that matter the most are command (being able to spot the ball where you want it, when you want it), movement and then finally velocity.
That said, it seems like velocity reigns supreme today, everyone wants power arms. But we've seen it with Tanner Scott, it doesn't really matter what the velocity is if you can't locate it. However, I think teams would rather work with guys that have high velocity instead of a soft tosser if everything else is equal.
Whatever, I'm rambling. I'd love to have guys that have to strain to hit 90 mph if they can pinpoint it, change speeds, have great movement and shape to their secondaries. But the guys that the Orioles are bringing up don't seem to have it.