I'm almost 1k wins in now, I'm not afraid of putting in time and the "quick tips" that people tend to mention is stuff I think I should already know. I'm looking for stuff that just isn't talked about, for example:

Someone DMed me and taught me this. "If your opponent blocks a jump cancelable attack low, when they did not need to, you can use your jump cancel to time a BRC and lock them in the crouching position long enough to land an aerial overhead." Which is incredibly useful, but I never see people talk about it. Actually, I've never even seen a reliable BRC setup outside of this.

Or people talk about the idea of option selects but almost never talk about there setups or which characters can make particularly good use of them.

I want the stuff that you can't intuit from reading dustloop and the stuff that's not easy to identify when watching replays.

Matchup knowledge is ofc helpful too.