I play on Moon Guard as well, so I haven't noticed the quietness of other servers, unless I'm leveling an alt or something. (I kind of ran out of space on MG for more 100s... oops.) MG is actually a pretty nice server overall, even with the trolls and goldshire taken into account. I've been here since pretty much the beginning of Wrath. :x
Not really playing much at the moment (I'm playing FFXIVmostly), but I still log on every day to farm gold in my garrison. Might as well take advantage of that while I can. (They're taking out the gold missions come Legion, foo.)
I'd doubt they would remove the garrison entirely. It's kind of integral to parts of the leveling story for 90-100. If they took out the garrison, they'd have to rewrite rather large chunks of events, and I doubt that they'd bother doing that when they could just focus on the new stuff. (It would also break a lot of achievements and whatnot.)I heard they were doing away with the garrison all together but my resource on that is kinda sketchy. Yeah I mean I've met a lot of cool people on there have lots of fun. It's one of those things you just really need to spend a little time there to check everything out.
I'd doubt they would remove the garrison entirely. It's kind of integral to parts of the leveling story for 90-100. If they took out the garrison, they'd have to rewrite rather large chunks of events, and I doubt that they'd bother doing that when they could just focus on the new stuff. (It would also break a lot of achievements and whatnot.)