As much as I agree with you (I’ve been holding my breath waiting for S35 for what seems like FOREVER) Blizzard just simply does not care about D3 at this point. It is not generating $$ for them, and the player base is too small for them to devote resources to appeasing us.
They probably have 1 person from another Diablo team writing the new season preview post in their spare time, choosing the next season theme, and flipping the switch when it’s time.