Can we get an updated stance on the ADC role?

I'd really like to see some official thoughts on the ADC role. The general consensus seems to be that ADCs are too strong and too well represented, which I can totally see. ADCs are the main class that both appears in all games and tilts the game in their favor (meaning the better bot lane wins).

This also has to take into account the support role, of course. The problem being, is that the supp role was made mostly to improve the ADC role. They offer a lot to the team as whole, but at their most core ability, they are meant to buff the strength of the ADC.

In many players eyes, this has created a stale bot lane where it tends to be ADC and enchanter or ADC and tanksupp vs... the same two types of lane. Add on to this that ADCs tend to do the same 2 things in mastering their champion and it gets very stale. Those are to 1: Position well in order to do 2: Auto attack everyone to death. That's the core of what ADCs do and while not totally awful in design, the addition of many questionable design choices (such as crit, uninteractive healing/shielding supports, and ADCs with no real weakness) leaves a lot to be desired.

Think of it this way, if EVERY marksmen were to receive a big nerf, (lets say X% damage decrease) what would change? In other lanes, they would be overtaken by another class. Here's what I mean.

Top lane, if let's say the top bruisers were nerfed, many other classes will take over, even if the nerf to all bruisers was a small thing. There are mages, tanks, ADCs, fighters, etc to succeed. Honestly many things do well in top.

Mid lane, if let's say mages were nerfed, other classes can still excel. Assassins (like Zed, LB, Talon, and Fizz) can do well, some ADCs do well ( like Corki and Lucian, historically), and even some tanks can do well.

Jungle has a very diverse cast, and even though one class might be favored from time to time (like tanks), many other classes are still viable.

Then we get to bot lane. For supports, a few types gdo make it in, and that's good! Enchanters (Sona, Janna, Lulu, etc), tanks (Braum, Leona, etc), and damage (mostly mages like Brand) all do alright. Even if enchanters to have the strongest presence. Also the class that most directly buffs the ADC. Hmmm.

Then there's the other part of bot lane. There's only one real choice here and it's ADC, AKA marksmen. For a brief time there was an occasional option like Ziggs, but his time is done. Now its only marksmen, no other choice is really possible. Try as they might Morde bot lane never caught on much (ranged beats melee, who would have guesed?!).

So RIOT, I just want to ask you what your thoughts are on the total superiority of ADCs in the bot lane.