Provably more improvement will come on Wemby side since he's so lucky that he's been part of Spurs since we all know that Coach Spo is great upon developing a player. What plays he set is all for Wemby since he want to see on how they can totally use him in court. But right now its just they can't get the best result since they are losing to much and I think that's part of the process.
Wemby is really great we can see that and for his performance shown where there's a downside I can say its normal for a player playing on new environment which have more though competition. But once he adjust and follow what the coach teach and set plays for sure Wemby became more better player.
Wemby is at Spurs, Coach is Pop, not Spo (probably Miami coach?) but yeah he is good at developing players too. I think the biggest issue Wemby will have could be physical, not about his game because he is already a great player even at this age and the more he plays the more time he will have to be even better so that will not be an issue for him.
Yeah, too tall and a bit lanky, needed more muscle specially in his lower leg, but this could take out his skills though and it should take sometime for him to develop what the Spurs are envisioning him to be. Do they want him to be Giannis like? or just like KD, who didn't put up muscles but developed his game?
As long as he can build a body, and keep on trying his best, he will be fine. This isn't about putting on muscle, look at Durant, dude is still a "weak" player when you look at him, but look at his legs back when he joined and look at his legs now, dude knew that he needed to have a better core and he did that, he is doing amazing thanks to that, Wemby could find what would help him and do that too.
Might be good in legs or the lower body because players are "prone" to injuries. Kawhi too developed his lower body in the last 2-3 years after his season ending injuries. So again, let the Spurs develop his potential, his physical and then let the game come to him as he will get more experience in the league.