Please don't nerf Shyvana.
I don't know why she has the #1 winrate right now... I really don't. But she has been untouched since 5.23 and if she really deserved that spot she would have had it for the whole time since 5.23, and she hasn't. People who have over 125 games with Shyvana had an average of 56 to 57% win rate. That's incredibly low, when you look at champions like Poppy who have a 60% win rate for experienced Poppy players. Lux has almost the exact same win rate as Shyvana, 53.6% average and 56% for experienced players. But is Lux getting nerfed? No.
I guarantee you if you just leave her alone her win rate will slowly decrease overtime regardless of the incoming patch. This is purely a coincidence that her win rate is this high. I am a one trick Shyvana player and I consider Shyvana to have too many weaknesses and making her any worse is going to make her very difficult to pull off when she can be so easily exploited, and has basically no CC, plus she falls off lategame. The only reason I play league is so I can play Shyvana. Please.