Bug Reports are for behavior that is not intended, so this isn’t a bug. I’ve moved it to General. For what it’s worth, the “Top Identifiers” list has been discussed multiple times on the forum.
In my opinion, every solution will have trade-offs, and I don’t see any other system as being significantly better than this one. For example, quite a few experts are busy in the field or doing other things and they often add agreeing IDs after the observation has already been identified correctly, so a system that emphasizes improving or leading IDs would be biased against them. A system like that would also probably encourage people to make guesses to be the first with the “correct” ID.