He could end up being a decent player. He's 6'10-11 or so and has range. I think he could be a better version of Kaminsky when all is said and done. They are similar players but I think Leuer is a better rebounder and being in Memphis for a year probably helped him develop some more of an inside traditional "big man/inside" game. Whether he got a lot of minutes or not he still practiced with a team that lived by their defense and focused their offense on their bigs.
He could have a Plumlee type of impact in that he didn't play much where he was before but could make an immediate impact because of necessity for the Suns needing a PF/C. He didn't get an opportunity playing behind Randolph, Gasol, Koufos, Jeff Green, and the other talent in Memphis.