Carries as a Class
I think Carry should be a class not purely made of ADCs. I am sort of casual so I enjoy most all metas. I even enjoy tanks bc I appreciate that the tanks are largely what their kits bring to the table. The only thing is all the damage shouldn't be zoned behind them. The way I see it, Ashe and Cait, even though they do good dmg, would not primarily be carries bc they can do other things well and are safe. While Lucian, Cassi, and Rengar really only do one thing and should be phased into a new Carry class. Most assassins should be altered and also transformed into carries. Carries should be mid/late to late game champs if not snowballing and be huge for in later fighting.
Everyone being able to do huge damage makes how safely you can do it too valuable. Since atm anyone can easily blow you up, smart rotating, limited roaming, and selective fighting is par for the course in LCS. This would take a lot of balance changes, but the first step in doing this would be nerfing nukes and big burst.
Just ranting...