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I've essentially implemented what you've said here but on the server side using a Task Queue, the only thing we lost was on-the-fly updated battle numbers, but those aren't really being used now that we have priority battles. Also, priority battles are delayed by up to 100 pairings per rumble, but this new design should mean that stuff sticks around in local memory longer than before.

Once I add contributor stats I'll also add information about the current amount of queue backlog, so people can decide whether or not to run a client.

If you check your clients you can see that the uploads are going much quicker, and it tells you it is adding it to a queue instead =)