Most hardcore groups in WoW logs in for a new expansion, clear the game and stop. They don't even login if they already have gear for the incoming raid, they just login for the raid.

That still identifies it as an hardcore.

That said, if you play this game casually, you get ONLY the worst (those nightmarish sidequests) and leave out the good (everything related to dungeons and raids once you reach level cap), so I think it's really wrong saying that this is a game for casuals.
Guild wars 2 is a game for casuals: you join and it's somewhat fun, even while leveling, then you reach level cap and end-game is still "somewhat fun", same as before.

What really concerns me is that they didn't even add Alexander story mode (discovered now), so basically they wasted a good chunk of resources on this stuff that I consider boring, which makes me sad.
In addition, and no one is pointing this out, we are back to the issues we had at the release of ARR, the end-game content is lacking compared to the leveling content, which I suppose they weren't going to make it happen another time.