Yeah, well you were right to think that Legion will be released in June right after the WoW movie, cos that would be the most logical think to do in order to attract old players back to the game. However you were stupid to think that Blizzard will ever do anything logical.
Meanwhile in Blizzard's HQ: "Hey guys lets show them the WoW movie in June to get them hyped up, but lets give them the new expansion 2 months later, so that everyone plays WoD and see how grate the game is! And 2 months later we will give them our new expansion because they will love WoD so much in their 2 months gameplay that they will want to try Legion for sure!"
frost feels pretty ruined with no deepfreeze and complete reliance on rng frozen orb procs for damage, plus the pvp talents are scarily useless with very little choice (maybe they redesign some of them moving forwards, who knows) - arcane or fire may end up being slightly more viable, depends how much damage their instant cast spells end up doing in pvp
pretty disgusting playstyles either way, but hey that's wow pvp these days