My hearth is set in Dalaran. The Legermain Inn to be precise. I found that the “alliance-side” inn was just too busy. A quick survey of my guildies shows that they hearth in Dalaran so they can be close to all of the Northrend instances and to the city portals in case they need to go to somewhere in the old world.
So.. consider the implications of this change (from the 3.3 Patch notes):
When you use the dungeon tool to find a dungeon, you’ll get ported to the inside of the dungeon, much like the current Battleground system. When you leave the instance, you will be returned to your previous location. If you need to leave temporarily, such as for repairs or to purchase reagents, you can teleport back to the dungeon again. This feature can be used both by groups looking for other players and by premade groups of five who use the dungeon tool.
If you can get to the instance .. um.. instantly from a magical teleport.. then the only benefit I see to hanging out in Dalaran is that you can hang out in the new /lfg channel (currently only available in cities).. and /trade.
Hmmm well there is also the daily regular dungeon quest.. and the daily heroic.. ahh wait, they’re removing those. So.. daily cooking and daily fishing. That’s it.
Do you see any other reason to keep your hearth in Dalaran?