I can see where you’re coming from with the first idea, but that probably isn’t going to work out too well due to the scarcity of phases that host in lore-established locations (Elwynn, Desolace, Redridge, etc). Maybe it could’ve been a neat addition if there were a larger complement of phases, but even then it’d only fulfill the wishes of a small niche (no disrespect) compared to those that use the /who function or the TRP3 scanner.
I’m not so sure about an updated main phase either unless some changes were made. The main problem with MP Booty Bay a few years back was that it was unregulated. Sure, moderators would handle any issue that disrupts the actual roleplay (overscaling, spell-spamming) but they never really dealt with the roleplay side of things. That meant the best thing you could do against metagamers and powergamers was /ignore them, but that would just break the immersion, especially if they stick around and essentially RP around you. I think a good compromise to this idea would be to add a feature that copies the MP’s NPCs and objects by zones. That way, you’ll be able to modify the zone to your heart’s content while doing a minimal amount of work, and not running the risk of … overwhelming your phase with EVERY gobject and creature from the MP.
In fact, I recall such a feature existing at one point, but it up and disappeared. I don’t know if I’m thinking of another server or a past version of this one.