Bit the bullet. Faction/server transferred from dead old Suramar Alliance PvE to Mal'ganis Horde PvP. It's going to be like a whole different game, from community, to faction, to server type, to population, to activity level.
Orgrimmar is a fucking maze to me. Seven years and I've just played Alliance really. Guide to surviving my first trip into serious Horde territory!
My reasons were twofold; old WoW friends returning to play, but on Mal'ganis, and second, goddamn, I love how intensely active the Trade and General channels are on Mal'ganis. PUGs and chat are always happening. Suramar isn't truly terrible, but it's very quiet by comparison.
I hope this transfer goes through within the hour.