A new and more open color management workflow! (ACES and co. should be a friend and not a nightmare!)
The color management in AE is very special but sadly not in a positive/professional way.
We need a open and complete new color management system (also for professionals) where we can manage e.g. a linear ACES Workflow (it a standard) in a usable fashion!!! … like in every other compositing or color grading app in 2019.
I think, beside of the missing multucore rendering and the outdated „3D“ Engine that's one of the main reasons why nearly no bigger postproduction studio is using AE anymore.
So stop fixing only the little things and face the real problems of the old lady - you really have to invest heavily in that features if the future of after effect should be bright!