Evancho' health needs to take priority. I would totally respect him not wanting to jump right back in to coaching. I also appreciate the optics wouldn't be great if he took a new job next season.
That said, I hope the school would not wait and see who applies. It should be a premier job in the Valley and they should be seeking out the strongest candidates. I'd want to pick up the phone and pursue Evancho, Moncman, Lane, heck, I'd give Todd Parsons a call at Brown to see if he's sick of recruiting yet. There's not a rock star assistant ok the staff, so I would hope they'd approach the opening like when they filled the hoops job successfully with a coach with big success elsewhere (who also was an alum).
What I realize is there may be limitations imposed by the CBA with the teachers. With all of the layoffs, hiring an outsider could be a problem. But barring that limitation, they should go for it whenever the position opens up. If nothing else, Steve is 65 years old, succession is going to come up at some point.