Some need to understand that anything that lessens interaction in an MMO is a terrible thing and there are butterfly effects from more interaction, mostly positive. Instancing, in general, helped to take the genre into the wrong direction and ultimately limits it by placing a ceiling on any of these unforeseen consequences of interaction. You're artificially preventing the fun and possibility of unknown interactions from occurring.
Here's an idea to repopulate Red btw: allow all players on Green and Blue to duplicate one character per account over to Red, an instant character copy minus banks and plat.
Instant server population acquired. Even time limit it for a "testing" phase if you want, maybe a month or whatever. Make an event out of it? /shrug
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