would be interesting to talk with somebody that was actually in the games and discuss some theory / meta. from the first video (neaps) it looked like the mele/ burst heavy comp plowed through the dot/rot heavy comp before they could really get all of their damage rolling. but that's kindah tricky to see unless you have a spectator streaming the game.
As far as heals go I was surprised that the shamans were all on the bottom of healing done (yes they have to play utility as well but still the number difference was suprising) additionally I was surprised by how few of neap heals got purged.
I think we may see teams push one shaman on offence and take a third heal of a different spec.
I think hunter has a huge role on teams not only with the auras you can get from bm pets but also in their utility. (ranged interrupt at 40 yards is ridiculous as well) it may be as important as having a warrior or bm was in 19s as the meta develops
Jcm seemed to lack hard cc on the wave of mele at the start who moved in. (hunter would have helped there)
rogues will shift to a larger team fight presence (stun bots).
Wouldn't be surprised if I saw more moves to land kills on heals.
I dream of the day I can play druid as an actual healer
over all im looking forward to seeing how the meta develops.