Embiid and Okafor are incompatible playing together at the 4 and 5, and that's pretty much been proven in their last ten games or so, which has been terrible when they shared the court together. That "twin towers" lineup is finally supposed to be done for them, and pretty much everyone in their organization, especially the fans, have come to terms with that.
Simmons is also going to play PF. He's not a guard, and he can't really play the SF either.
They're pretty much set with Embiid at the 5 and Simmons at the 4 with Okafor and Saric being the main bigs off the bench. They'll be forced to trade Noel before the deadline, because A) he doesn't want to be there, B) Okafor has virtually 0 trade value at the moment, and C) that means that Noel, even with his contract and injury issues, will bring back more in a trade for them.
They should get a backcourt piece and a wing in the draft this year between their pick and the Lakers pick, so they should start getting better next year, though they still have a long way to go before ultimately being anything good.
Imagine if they wouldn't have screwed up on Okafor and picked Porzingis. Then they probably would've went with Ingram over Simmons this draft, and they'd have a ridiculous four-man core of Noel and Embiid at the center spot, Porzingis at the PF spot, and Ingram at the 3 spot.