The problem is he can't guard today's 4s so he'd have to be as good offensively as Niang. I just don't see that happening except when you play teams with 2 big guys.
To be fair, on the defensive end, Niang struggled to guard quick 3/4 guys too. Solomon needs to guard a 4/5 for sure at this point, but that doesn't mean he can't play on the perimeter sometimes on offense. That does take a rebounder out of the middle though.