Yeah I would like to see him spend some time there as he does leave defenders on the ground with his carries, and he also has the ability to stop a ball carrier quickly. I think he could play in a similar role to Tino F from the TitansThink he'd better better suited to prop? The nuances of edge back row play like hitting the right lines at the right angles, promoting the ball at the right time, defending in open space wouldn't be easy for a guy coming in from rugby union, developing those things take time.
I know this much, he is physically capable and loves to tuck the ball under and run hard. As you said great attitude. He loves to run hard and defending in the middle isn't as complex as defending on an edge. I wouldn't mind seeing him spend some time at prop, especially considering we are weak there at the moment.