None of the things in mage by themselves are a problem. Solid Alibi I knew would be good bc of all the freeze effects available to mage all while being recastable with Dawngrasp.
The issue is Mage has a wincon in a hero card that also regains tempo and stalls. Mage is really reminding me of the Boom Mad Genius era of Control Warrior, where no individual card was broken (except for maybe Boom giving all your minions rush), but every single card on the curve was good at pretty much any single time in the game.
Blizzard needs to probably make Dawngrasp significantly weaker AND they absolutely need to push Kael’thas to 8 or 9 mana (or simply just get rid of him. He never should have been created.)