It's cute but I don't see the benefit. In my experience, if one LLM fails to solve a problem, the other ones won't be too different.

If you picked a problem where LLMs are good, now you have to review 3 PRs instead of just 1. If you picked a problem where they're bad, now you have 3 failures.

I think there are not many cases where throwing more attempts at the problem is useful.