I voted the 3rd option. Cassie is a very strong character but she's not a character you'll pick and beat everyone with when you will pick her for the first time.
And stop defending Cassie just by saying her pokes are 8f, her fatal blow is meh and her U2 not good.
The Fatal Blow is not that bad. It deals high damage, it won't caught an experienced player on neutral but it will prevent him from zoning because on a read it deals a great amout of damage. If you realize your opponent will block it, then you can land either close if the opponent is fullscreen or fullscreen fatal blow if the opponent is close. It won't prevent you from being punished but most of the characters won't be able to punish you with their most effective combo, so it has a certain level of damage control. In Yaas Queen the Fatal Blow can be connected into a combo, so it is great to deal unbreakable damage from an unbreakable combo. Yes it is probably the worst FB if you try to land it in neutral play (it shouldn't be used that way anyways), but it s not that bad.
Yes her u2 is meh. But it is not worth using because it needs a huge read to work and is full combo punishable with any character. U2s are not good in general in the current meta.
And for the pokes, yes they're 8 frames but if you connect it you can start your pressure with the 9 frames mid and staggers and even mix up with throws. And her d4 is quite good so I wouldn't complain if I played Cassie.
Also, it is not the case here, but I often see people complaining about her d2 having no range. What do they expect ? They want NRS to buff her until she becomes so busted it's not even worth picking any other character ?
Of course she has flaws, and fortunately she has them. I think you're trying to downplay the character here. I don't think she's the best character but she's definitely top 3. She's a threat anywhere on the arena and has a decent answer to almost all kind of situations. Both of her variations are very good. For me she's the second best character in the game. I would have put her top 1 if she had a throw KB.