There is little doubt that a very fundamental part of a gaming launch is the advertising and marketing from the development companies involved. The question is: With so much emphasis on advertising and marketing, is the hype meeting our expectations?
Who says a dud game can't have a video game comeback?
Cyberpunk and No Man's Sky have to be up there. We're lucky and cursed, equally, to have games that can be updated now. For folks old enough to remember the Sega/SNES into PS1 and even 2 eras, if a game came out that was half baked (*cough*Angel of Darkness*cough*) that was it, no redemption. At the same time, having the option for updates shouldn't be an excuse for half assing games.
Diablo III still works on modern PlayStation and Xbox consoles, and remains hugely playable a decade after initial release.
Are you comparing a continuously improved 10+ years old masterpiece with the... beta of an unreleased game?
Diablo III: Season 28 brings with it the Altar of Rites, an altar full of unlockable bonuses and potions that will require the gathering of tons of resources. One of things needed is the Staff of Herding, which also unlocks the famous Cow Level known as Whimsyshire. Here's how to craft that staff, for those that either have forgotten, or have never completed it.
Game hype will never meet expectations :)
When I think back on medal of Honor: Warfighter I am really disappointed. I got so excited about the game because we were promised to get a look inside the psyche of the soldier - it wouldn't just be another FPS - what we got instead was even less than a decent FPS. Hype like that is uncalled for, don't promise something about the core gaming experience which you totally miss.
Another example is hte Mass Effect final ending. The promise from EA was that your accumulated choices from the series would have an effect - it didn't.
Just deliver a good game, hold back with the unrealistic hype/promises.