Actually summoning her on 6 mana is already pretty late and you can compare her to other 6 mana minions if you please, I am going to list a few
Her brother from another mother, Grandmaster Zendo, is a pretty underplayed card that has a super immediate effect that would in the best case (for you) scenario deal 4 damage to your face plus screw up your positioning completely for the next turn AT LEAST which can be enough to close a good amount of games
Just throwing Jaxi Truesight on the table for any faction with a good chunk of buffs is already game over in most cases
Even the good old common First Sword of Akrane, though it looks lame it has a much more immediate effect than Variax even at turn 6 where it can lend you 2+ extra damage that might be the game finisher if not, then there is a big body to deal with
Now all these are solo cards and not combos and thus their power HAS to come as a close second to hers IF combo’d (that’s how combos work, hence Songhai’s 1 turn OTK with backstaby thingies) ((although honestly if you’re indeed playing a control deck where mistakes cost you games [control is the one more focused about positioning and playing things right, right?] then being mispoisitioned by Zendo will more often than not be much worse than some 5/5s being dropped next turn))
Now there seem to be something a lot of players don’t pay attention: counters. If Variax is weak against Aggro and some controly cards and you keep facing her and losing but you refuse to tech in these cards or switch to Aggro then you need to understand, you’re being countered. There is no way to create a perfect deck in this game and if you go to almost any top tier S-ranked player with a deck or card in mind and asked them, this thing keeps beating me, they will give you a deck or a card that completely counters it in such a way it becomes mostly a “don’t laugh challenge” for you when you are facing it again. (whyb0t did a great job at explaining this but I had to elaborate a little bit more)
Oh and yes, this is why Healing Zir’an was top tier last month where there were a lot of burny burny decks as she was their hard counter, even if they were overpowered last month (less so after Gaze’s nerf this month)
.’ This is my big beef with the card.