"complex" isn't going anywhere. Complexity in languages only rises with age, and C++ has it especially because it's meant to be very general-purpose rather than specialized. Everyone uses C++ in different ways for different purposes, leading to additional complexity to keep everyone happy.

"sanity" might refer to default behaviors. If it does, there's not a lot you can do there either. You can't go changing fundamentals of how the language works, because backwards compatibility is paramount. There would be riots if a new standard broke significant chunks of legacy code - even for the better.