I play on Orsha.
I rarely have lag at all (aside from perfomance lag), and when I do its limited to a very specific channel, so leaving the channel solves the problem no sweat.
I spend my dungeon runs on solo boss rushes, so I don’t experience that queue very often, but I haven’t had a problem getting into a mission (more than 20~ min in queue) for over a week. I have disconnected one time going into a dungeon, and it didn’t even use the run up, so I still got my 3 runs that day.
I live about 13000km away from the server, and have no lag problems. Queues are slow when I play at night because I live 13 hours off of EST, but are perfectly fine (less than 5 mins) when I play on weekends. Even when they are slow, I can genetally get my first queue to pop within thirty, and the second two go within 3 minutes.
Honestly? Orsha feels more than fine to me. I wouldn’t cry if there was a merge but I hardly feel it’s necessary.