Why do you want to change the engine again? 90% of the managers yet fail to adapt their players to the last change that was made, I wouldn't say it's time to make enough change yet again.
If you search the right combination of players and skillsets, the inside offense is still very effective. Unfortunately I still see many teams playing the tactic with oldskool players, that's not gonna help you.
This team f.e Dutch Pacers
(38253) managed to make the required changes. I'm still hoping I succeeded as well, still managing to win my games, never trained guards in my life. Always been an inside team. But I'm still not sure if I'm just being lucky right now. Even teams with a very strong OD got a tough time agains the quoted team and mine. If you check the NT of Italia f.e, somehow they also manage to stay a (mainly) dominant inside team. Like in this game
(7992). Also note the amount of great PFs in the Italian selection, opposed to mono-centers.
I know it's maybe too easy to blame it fully on the managers because the time has been short to train new sort of players, I believe the few ones that actually changed the way of training players will dominated the future, but I can remember some data not too long ago, that even after the changes were announced, we didn't see a huge change in training schedules overall. If you don't adapt, you can't win.
Maybe I should blame it at the 'BB-Culture', the 'big active group of influencal managers'. I've seen a lot of efforts from the BBs to guide everyone in the right directions. A lot of posts that reveal a bit of how players should look like, news items where BBs say what skills will be more important and what skills won't. Somehow people don't seem to notice the comments of the only guys that actually know what's going on in the engine.