How is Xayah Balanced?

Xayah's kit takes the best part of every adc and makes them hers, with almost no drawbacks. Her passive gives her sivir-esque wave clear, her q by itself is eh but op with her e, her w is ashe q but also gives movespeed when you hit something, her e is kalista rend except it does much more damage with less stacks in an aoe, and scales off of crit chance as well(wtf why?), and her ult is vayne ult except actually invincible and does damage, and again is op with her e. I really don't see her downside? Low mobility doesn't really mean anything with the root plus kiting potential, and invincibility for burst, you can just kill anyone who gets in your face with ease. She completely decimates team fights with aoe autos and roots galore, it is really unfair to play an adc who isn't cait into her, and I hope that riot can see this and attempt to nerf her to a more fair state with more counterplay other than "don't stand near her feathers which can take up an entire lane and one shot you"

Edit: Here are a few changes I would consider making (Not all of them but one or two)

1. Nerf Bork. Self Explanatory really but incase you don't know, it gives 40 AD and 8 percent current life on hit, lifesteal, attack speed, steals movespeed with active, and heals for the percent damage. If that's not overloaded I really don't know what is.

2. Passive damage passing through should have a scaling of some kind. It an be how close the target is to the first, how close you are to all targets, crit chance to emphasize more crit/less black cleaver b.s, attack speed (maybe not but you get the gist), something so it's just not Sivir richchet after every ability, that's dumb.

3. Remove one aspect of the W. Attackspeed/movespeed/more damage on a singular ability. It would be fine if the rest of her kit was garbage, but it's not. Just pick one and remove it, I would recommend movespeed on hit since she buys a black cleaver typically and has stupid chase potential.

4. Lower the duration of her feathers/reduce the distance she can call them back from. I would be fine with the amount of damage/cc they provide if they didn't last as long/can be pulled from stupid distances.

5. Make her target-able during her ult/severely reduce the cast time. In my opinion it's just too free of invincibility. Ekko is encouraged to use his at low health and unless you have been in the fight for less than a second or two, it will put you back into the fight more or less, Zilean has to time it correctly so it isn't wasted. If anything manages to get past her team mates (say rengar or nocturne, which are solely designed to pressure back line), she just presses one button to be invincible for 1.5-ish seconds, which is a long time considering a squishy is now inside your team alone. Combined with the new GA (you done fucked up), have fun killing her in a team fight.