You haven't described those "fundamental problems" that you call bugs, but I think these are irrelevant for me from a ClojureScript point of view. As an example, immutable data structures mean that equality comparisons are cheap and I can often avoid re-computing and re-rendering huge parts of the tree.
More importantly, I don't have a React performance problem. I don't really need "much faster".
More importantly, I don't have a React performance problem. I don't really need "much faster".