The difference between unique and overly complex
While I am all for the current mindset of the balance and design teams, I feel there is one thing I could point out. If your your goal is to design unique champs that each feel a strategic niche in the game please keep the following in mind.
Each champion by default has 5 routes by which to make them feel unique, the Q, W, E, R and passive
Great design would be working within this framework to create a multitude of unique fun champions that are overall balanced for the most part
Terrible design is not doing that at all and each champion feels like the same thing with a different skin
But in between that is C+ middle ground I think we are currently floating in where, yes each champion feels unique and original, but the method used to make them so is by adding layer and layer of complexity to the point that some of the champs now feel a bit like "my W does this, except when X happens or every 5 minutes when it does double, unless 3 champs are there then no except if the champs have red hair on tuesday then its double AAs." While yes, this is an exaggeration, some of the recent champions released and some of the new and upcominh reworks feel a bit like this.
There is imo, a well designed champion with unique style, and then there is a overly complex champion that is unique by virtue of having 4 passives and each ability have conditions that change it and it becomes a bit of a cobwebbed mess.
My fear is that by making each champion so complex we raise the skill ceiling through the roof(pun intended) where as a player who mains a champ will understand it, but picking up new champions feels useless as it can be a bit like trying to build an IKEA bookshelf when the instructions are in another language.
Azir is a great example, a powerful champion capable of many things, he is also very complex and the average player who doesnt main him will have a hard time even getting mediocre result, hell even a lot of pro middle laners have issues with using him. And while on a few champions this is perfectly fine...even good, we also have the balance of champions that are a bit more pick up and go. Not to say practice doesnt make you 100x better on a champion, but there are champions that about the first few times or for someone not maining them the understanding comes a bit more fluidly.
The upcoming coming changes to Corki or Caitlyn for example feel like trying to give a much loved and not underpowered champion there one niche(which is a good thing) but the route for doing so isnt to rework the kit to create something unique, but rather just add more and more to it until it is unique in the way my bedroom is unique because no one else's cluttered mess is quite the same design as my cluttered mess.
While I love the goal you are currently striving for, please keep in mind that a simple and streamlined design is what ppl want and the engaging fun kits dont have to have 1000 things going on.
TL:DR KISS, Keep it simple stupid