It really doesn't help the game now that adc is the "Fill" position.
The writing is on the wall.
ADC, the most game bending position for feast or famine gameplay, is now like 40% of the "Fill" Game positions.
I used to "Fill" almost exclusively because I knew:
About 70% are Support fills About 20% are Jungle About 5% are Top About 3% are Mid About 2% are Bot
Now it's significantly flipped.
Now you get :
Adcs who are rolling Support because they believe they can play the non pressure part of the bot lane now that they are failing as adcs (ie Support's 70% has been reduced to about a 30-40% fill rate) Overabundance of Fills being placed adc so they do not know what they are doing (me being one) (probably 30%) Massive overqueue for mid. (maybe 0% from Fill) Maybe 10% Jungle. About 25% Top.
I know riot wanted to offer players adc balance, but they need to rush to do something to get adc players back in their role.