New ACES implementation

As I'm trying new DR 15 I'm feeling there is changes on the ACES front that I didn't find documented on the feature guide. There is this new Lut tab on the color management? There is no individual IDT selection on the color tab anymore? is this process automated?(looks like). Does the color managed workflow on ACES carry to Fusion? As I tried it looked like the ODT is not "working" on fusion.

Cheers!!!