I mean, if those improvement deltas are all in the processor part, would a hypothetical Mega 32-bit, or a standardized 32-bit Arduino platform(that isn't Uno R4

I mean, if those improvement deltas are all in the processor part, would a hypothetical Mega 32-bit, or a standardized 32-bit Arduino platform(that isn't Uno R4 - no way a Renesas part can be an industry standard with their typical "JTC" style of business) not solve the issues?