And I gotta say, it made me so much more productive.
First of all, I am one of these persons that chat too much ingame. It's a bad habit of mine which leads to nothing, but makes me unconcentrated.
Now that I disabled All chat, I already notice that I concentrate much more on the game. Right now I only play normal and FlexQ games to get back to jungle Taliyah since I didn't play that in a long time, so I don't know if it will make any different in ranked games, but so far from the games that I played with All chat off, I realized that I should have done that way sooner.
Disable All chat. There really is no reason to have it enabled.