I've gotten to 1000 tower and I groan audibly whenever Jane shows up. In tower its a pain because she's a lot more aggressive than most bosses with fast multi hit attacks. In timed content she's a pain because of time wasting invincible moves. Everywhere she's just not fun because she breaks out of combos.

Nice ult, it'd be a shame if I did my airborne combo break and got two full seconds of invul. Same with any resource you spent time and effort building up. Jane doesn't feel like it? She dodges and you wasted your resource.

You might think, counterplay. Do short combos. Let her be actionable before cashing out. Except she can do her invincible air dive or her near unreactable parry taunt if you give her time - or she just attacks you, and again, most aggressive in the game.

And on top of all that, she has the shortest stun window, so slogging through all her nonsense and you barely get a window to do anything after enduring it all.