Chicago area would be the best, agreed. It's largely that there'd be a lot less reaction if they stayed east since we're just used to it, Europe wouldn't be hit as hard, etc; I mostly just skipped out on anything that said it was extremely latency sensitive and was ok before.
My hope is that the hardware is better and the routing is better and seriously 90% of the NA player base won't realize anything has changed. The situation for people in South America is awful, and they could have done a better job of letting European players know they were going to see a performance hit back when they did the Euro server transfer. But it's a net gain for people in the Pacific, is a gigantic reliability win for the PS4 community that got screwed the hardest by no VPNs, and if they decide to go all in and remove double oGCDs as part of the combat rebalance I will cry it'd be relatively unnoticeable.
They had to leave Montreal; I hope whatever drove them this far west was worth it. I look forward to still being bad at games just with slightly less latency.