He's just so raw offensively. His footwork is awkward and his ball-skills are average. If he can develop a mid-range jumper that is great for floor spacing. Then just keep refining his footwork, his decent turning over his left shoulder on the right block, but needs to expand.
It's possible, but I'm skeptical he's really going to refine his offensive game. Adding a jumper, which I think is possible, would be a great step however. Playing with better players, will also help, allowing Basabe to be great garbage man (a role he can excel at).