LaVine and even Derozan will cost some first-round draft picks which the Lakers do not have. AD in the last few years has been showing signs of being injury-prone, so it'll be very costly in terms of assets to trade him with those Chicago players.
OKC has a lot of future picks but I doubt they'll give up even a single first-round draft at the moment without receiving something worth it. OKC is getting better and it seems they are a serious playoffs team in the next few years. So they might only start trading their future first-round picks when some of its young players mature a bit. Or when someone in their starting position isn't compatible with the rest of the players.
I agree with you, I think OKC will keep their squad and will continue developing their young core
SGA as alpha and the rest will give him the support that he needs to continue being competitive.
Just allow them to grow together and hopefully they will learn from the mistakes that they made before, keeping the young core
and making sure to established trust and good companionship.