I think generally around mid diamond and up is where I expect people to at least think on stuff to that level to improve and climb. I'm being a bit generous here, because I know there are people that get to that level via group queue, mechanics, and carry stuff without having to engage at that level of thought on it. I do think it's a core skill that is going to be more present at those levels here soon though, at least I hope so.
Right now, I think even lower diamond players all know 3 tanks is a busted comp at the least though. I see it in every single game I'm in these days, even in QP.
Thanks. I'm getting into streaming and clipping content to keep myself entertained. On a break atm cause I'm frustrated with the meta, plus I have other things I have to focus on for the next two weeks.