Jordisk

And I assume editing the list of shards that it checks is a hassle, so you can't just remove the two that are down and then add them back afterwards.

I understand that this requires a shutdown of the system used for those two shards, but why does it shut down ALL the shards? Two of the shards are on one machine, the other two NA shards are on another, and then the EU shard is on a separate machine in (IRRC) Germany. Shouldn't you just be able to shut down one machine, upgrade/replace it, then run a reset to make sure it is connected properly and running?