They have in no way given us a "shit ton" of info. They have shown us a very very basic talent tree, a few rune combos and introduced some new afixes.
We have gotten 1 quarterly update so far that was about monster families.
I hope you are right that we will all be playing d4 in 2021, I just don't think it's going to happen.
I am really looking forward to the next update and hope it is about actual game systems and or endgame.