i had same problem, restarted 3-4 times, wow and bot, only bot, then he againd died, i go to WC - when i back he is continue, so just let him to stay at graweyard, and wait around 1 min hehe
you guys might want to idk, go to navigator log? It should be saying that its downloading meshes if I had to guess? at least that's what mine is doing right now.
yes check the nav log. i started in northrend and after about 3 mins i check the log and it was still downloading a new mesh every 6 seconds or so. after about 8 mins it finished and was moving normally.
edit: o ya, and it took another few minutes after dying to download more meshes.
1: HB is still in test phase.
2: Press stop -> play and it works again.
You dont have to run all the way back, just babysit it sinds this is a test release.