Osuna's change is solid. Got silly looking whiffs from both Lough and Snider. Didn't notice any breaking balls. Seems to spot the fastball well too, pitches inside and on the hands consistently. FB might be a bit straight, but at least it has that downhill plane so it's not "flat".
I like his tempo too.
Definitely looks like a potential #3 to me. I would put his upside into the same bucket as Hutch's.