his most 'developed' skills are rim protection and shot-blocking. That's not somebody you want running around on the perimeter. IMO, Sarr wouldn't be an Ayton partner, he'd be an Ayton replacement
Yeah, another Ayton is pretty much how I view him, except if you watch footage of Ayton in college and compare it to Sarr, it's quite clear Sarr shies away from utilizing body contact to create separation or to bully others. It's the same when comparing him with Mobley or JJJ, who were much more physical than Sarr and used their bodies extremely well. As such, Sarr can't really play as a top tier big man. At the same time, he doesn't have good enough ball handling and shot creation skills to be dominant as a wing/forward.
In that sense, I really expect him to be Emeka Okafor or Marcus Camby with the capability to stretch the floor with a solid jumper, get occasional points down low, play defense, and grab some rebounds if he's nearby the rim. Then, Jonathan Isaac on defense. Whether or not he'll be as defensively dominant as Isaac remains to be seen but that's probably where his real potential lies. I'd expect an 18/8 guy where he is more starter/borderline All-Star but with All Defense potential....again, similar to Ayton but with higher blocks and assist numbers.
Rim running, putbacks, open jumpers, "occasional flashes" is how he'll score but I wouldn't expect a guy who can be relied upon to dominate when it matters. Then, if he's running the same plays and routes as Ayton, having both on the court makes it extremely redundant unless you plan to replace Ayton.