I can’t really comment on the exact state of the games compared to how they were prior as I never played either of them. While the overall actions were the same, from what I’ve heard, the final state of each game is completely different.

From my understanding, Blizzard promised things and didn’t failed to meet those promises leaving a worse product than what was there. Valve didn’t do that, presumably.

Edit: I should also point out that wouldn’t you have to consider it anti-consumer for a game to do a total overhaul of itself? That prior version will no longer be available? Same with really any update whatsoever. At what point is it no longer the same game? If Valve instead released this updates over the course of a year, is it still the same game then?