I agree it's probably less than 50/50 he'll eventually hang onto spot. With that said, IMO, the real question is what improves his chances -- coming back to play the 5 position where we're primarily going to be asking him to hover around the rim and play a glue role or doing what Lance did -- go the D league and work on rounding out a perimeter oriented games. Also, even if the NBA doesn't work, it's not as if he'd suddenly be out of work. I think Amile's certainly got a chance to play abroad. When healthy, Amile's a pretty darn good player.
As for the comparisons to Lance, I would say that I do like his odds far better than I liked Lance's chances for a few reasons. First, while I don't know Lance's exact numbers, I'm pretty sure that Amile's wingspan is a few inches bigger than Lance's -- which IMO is pretty apparent when you compare how the two played in college. Amile's always been pretty adept at getting his shot up in the lane and a pretty solid shotblocker / while Lance never distinguished himself in either regard. Second, Amile's just has a lot better touch and feel within 7-8 feet than Lance ever had. Amile's been a bit limited by the amount of talent he's played with, but I think he's a guy who's always had more offensive ability than his numbers would suggest. Third, I think Amile is helped by how the NBA has been downsizing. Clearly Amile's got to develop a jumper -- like Lance has done -- but I do think his height, length, quickness should make him a good defensive 4 in the NBA.
Again, I wouldn't put money on Amile making a roster. But, frankly, I like his chances a lot more than I liked either Lance or Miles. IMO, Amile's a lot better collegiate player than both of those guys.