Fastest MS in the game
Wow, I didn't know she has 360 movespeed, Rito nerf plz. Wait, she only has 335? Well that's just bad info then OP.
Can kill carries in under 2 seconds
How many kills did this Rek'Sai have? Because unless you're release date Xin Zhao, that's not possible.
Can outdamage and outtank people with 3-4 damage items
Ok, now you've completely lost me. You're completely talking out of your ass now. TankPlank does significant damage to glass cannon Rek'Sai, so you're full of shit.
Mega sustain in lane
She only gets sustain if she's engaging you. Ever heard of poke or hard CC? Or a gap closer? Or ignite?
Virtually ungankable due to spammable mobility
Her tunnels are extremely easy to remove. As for the tunnel ability itself, its cooldown ranges from a whopping 20-18 seconds without CDR. Let's compare that to another champion:
. Shaco's blink is on a permanent 11 second cooldown at all ranks, with invisibiliy. So yeah, unless you're not destroying her tunnels, she doesn't get to blink around the map like Kassadin.
High base and High AD ratios even after pbe nerf
It's not base AD, it's bonus AD. And Gangplank has a higher AD and almost as big of AD scaling as she does.
Global ult mobility combined with Teleport makes her capable of splitpushing better than Trynd or Shen ever could
How many goddamn times do I have to say it? Destroy. The. Tunnels. See those red dots on the map? Step on those for 1 second. Literally just one little second. Just ooooone little second.
While I belive Rek'Sai is a little overtuned right now, I think you're just QQing because the scary void lady showed you the pain once. The reason why nobody is talking about her is because she really isn't that big of a deal. It's preseason, Riot's going to give her a little love tap, and then she's going to be fine, unless of course Riot nerfs all the other junglers as well.