Oubre is a UFA so this would have to be a sign and trade, thus hard capping NOP. That may not be a problem, but a consideration.
As to NOP more in general, I don't get why they would trade Zion. They have a really good core. They have the ball handler (McCollum), they have the wing (Ingram), and Zion is their big. So you trade Zion for another wing and a chance to draft another ball handler?
Even if Zion is unhappy and asking for a trade, tell him he needs to get back on the court and confirm his value. But I think aside from all that, they just need to get this core on the court together and see what they got. Let Zion show/remind the league what kind of player his is. Let him show everyone he really does love the game, is willing to work. I think NOP will be good. If it still doesn't work for whatever reason, then you can figure out how to blow up the team.