Nick,
Some items on that list, such as the vulnerability of hydraulic and mechanical lines, could be fixed, I agree. But the assymetrical VRS problem and the near impossibility of autorotating are things that are inherent in the design and will never completely go away.
We all want a faster ride but maybe we should just accept that helicopters are slower than airplanes, just as wheelbarrows are slower than motorcycles, and stop trying to crossbreed aircraft types.
I mean, you don't see anybody trying to mate a wheelbarrow to a motorcycle to speed up backyard chores, do you?