yeah for sure, and unlike most stretch 5's Ellenson can actually grab a D-reb and dribble it up the floor... I dont think having him play C would be asking him to do something out of his comfort zone.. He's a very strong rebounder, and would still be that at the 5 IMO.
Ellenson used to be 20+ lbs heavier, wasn't good weight though.. Here's a pic from 2013 and then one from the summer of 2014 at the Lebron Skills camp.. He's got a good set of shoulders on him..
Here's a more recent pic
So basically it's clear as day he's working really hard to get his body NBA ready..
Ellenson and Diamond Stone are both from Wisconsin which isn't a recruiting hotspot. both of them were chubby in HS, when Ellenson put his mind to losing the weight, he got rid of it quickly.. So I think it's reasonable to think he'll be continuing his body transformation with some NBA club..
If it's solid minutes at C you want, having Derrick Favors on the roster to give him some pointers will be invaluable.. With Rudy and Derrick, and I guess Withey, he'd have plenty of opportunity to play PF too.. Obviously he can take Lyles minutes at PF too.. (while Lyles takes Bookers)
The bench unit would be so much better, and more entertaining with Ellenson at the 5.. He'll cause massive matchup issues for teams.. type of matchup issues where players will be need to be subbed out so teams will go small.. You can't put like a Boban Marjanovic on him, that's asking for all sorts of trouble.