I'd be fine with Vooch, though he's a bit old for the J&J timeline.
I would only want to sign him if it's a deal that is a good bargain. So if he wants max or near max money, forget it.
But I'd give him the 4 years / $100 million Horford wants.
Vooch has been a productive scorer and rebounder for 6-7 years now.
Issues with Vooch are that he hasn't really developed a 3 point shot until just last season. Also he doesn't get to the free throw line. His overall scoring efficiency is pretty weak for a big man.
I would be surprised if he doesn't get stronger offers from Orlando or someone else.
Vooch isn't going to solve the Celts defensive issues without Horford, either.
But if he's an asset, then fine.