In my wanders on the beta today I noticed that several hydra varieties that have always been classed as "uncategorized" (i.e. not beasts) are now classified as beasts in the latest build. It must have been recent as cata.wowhead still lists them as uncategorized too.
These include Thessala Hydra in Maraudon, Strashaz Hydra in Dustwallow Marsh and Mystlash Hydra in Ashenvale.
Perhaps it's part of a general cleanup of uncatagorized NPCs, but perhaps something is about to happen?
Aku'mai (boss in BFD) and Gesharahan (rare in Barrens) are still not beasts. I couldn't find Trigore the Lasher (rare in caverns just outside WC) at the time, and haven't checked Gahz'rilla or Gahz'ranka (optional bosses in ZF and ZG respectively). I'm not sure if Hetaera in Azshara even exists anymore, but I wouldn't be surprised if she was removed.













