Why is there not a policy that any PR can be rewritten by a maintainer ? Wherever the PR looks a bit odd, rewrite it so do the same thing a different way. Enough unpredictable change to disrupt finely-tuned subterfuge.
you can wait for tree (or x) PR's passing specified unit tests for functionality and then merge a random one. But this is a luxury (effort wise) for any kind of project.
