Sunwell raid temporarily disabled

For those of you who have hitting the PTR to attempt WoW's hardest raid yet, the Sunwell Plateau, it's going to be turned off for a little while, until the next PTR patch, which "will be very soon." Updates on the various bosses:

• Kalecgos is close enough, will be finished internally and therefore presumably disabled on the PTR when the Sunwell comes back
  

• Brutallus's stomp will remove burn when he comes back, only for him to be tested briefly and then disabled.

• Felmys and the Eredar Twins will get "major changes"

• Trash (or, in Blizzard's euphemism, "the oh-so-compelling, non-boss mobs") gets "a good deal of tuning" as well

What have your impressions of the Sunwell been so far?