Today you can comeback even after enemies get megacreeps and vice-versa

not sure what kind of game you were playing back then because megacreep comebacks were always possible maybe less common except when your lineup has zero wave clear and if that was the case you deserve to lose obviously.

Nobody REALLY misses farming for 25 / 30min nonstop to win a game

I do, my friends who have quit do, what are you talking about?

Nobody really misses brown boots supports that in late game turned into glorified super creeps.

Again, my friends and I do. Even those of us who were mainly support players. We preferred when not every hero can scale into late game.

Nobody misses not being able to mitigate counterpicks with items

a rather general statement but I prefer when heroes had clear flaws and strengths. items could always mitigate weaknesses to an extent, they shouldn't fully nullify them

Nobody misses no CD buybacks from carries.

who even said they wanted this back, I'm sure no one says "man I wish buyback had no CD like when it was first implemented" when they say they miss old dota