Its just ridiculous at this point how a control card is used in every single aggro deck to deal 8dmg to your face. Like its not even funny anymore how every game aggro decks use a 9 mana card to finish you off. At this point the card needs desperately a nerf if this keeps going
I'm not sure how you came to the conclusion that it's a control card. It clearly does 8 damage to whatever I want to so I can put it in any deck I want to. Weirdly enough it also heals? Me or my minions? That's not really necessary but it's cool I guess - but I'll point it face to win games and smile because Alexstraza is a cool dragon :)
It's a dead card for at least 8 turns, win before turn 9 if you're aggro or keep your health total high enough if you're control.
Force them to use Alex for the heal or to target one of your minions.
There are many ways to deal with it, and paladin's winrate aside, if aggro decks are consistently running 9 mana cards, it means the game is in good shape. You should be thankful that aggro decks don't end their curve at 4 mana.