I do wonder what the relation between the primalists and the elements are. Razsageth is called Storm Eater which doesn't sound fun for Thunderaan. Maybe the elements will ally with us against them. Good way to bring back Thrall and give the Horde an iconic leader back (as a shaman instead of us a wimp who cries to his mom). Also can you imagine Rag coming back and this time being FRIENDLY with him?
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They do use Thaelin a lot. Probably a favourite of the dev team? Can't complain, he is a cool dude.