Getting Wemby off the bigger centers and allowing him to be a free safety roaming around should be paramount for the Spurs, I think Nurkic does that in 20-25 minute spurts.
The Suns get a point guard in Tre Jones to relieve some ball-handling responsibilities and gives them a body to throw against quicker guards off the bench.
Sochan is a big defensive body, giving you an option to play alongside KD when you go small and not get completely owned on the defensive boards. If he turned into Aaron Gordon-lite I think you'd be ecstatic.