Suppose he plays only alto, would you give him your tenor for a revision ?
I totally agree.I'd be more concerned about his level of experience and quality of work, rather than his ability as a musician.
Would you rather have a tenor player that is a bad repairman?
My guess is if everything is done properly and all the fundamentals through the scale work as they should the nuances will be there if its a good horn.
Some guys just have a gift regardless of playing ability.
In the MPC world JVW played very little if any.