cool ideas!
I'll be more than happy if they just make a mega set, with all the technic functions in it (Arocs is close, just missing RC), with all the PF motors (like 42030), pneumatics, etc.
It will be expensive yes, but I'd rather get tons of functions and really complex build experience over some rare coloured parts (41999) if I have to pay premium, plus, it will be a good showcase for Lego technic capabilities after all those 40 years of development.