I think it's about 50/50... There seem to be the one side always calling for more casual content and access to everything, those are the ones who expect too much. Then there's people like me who accept most of it the way it is as long as they keep raiding somewhat interesting and with Legion we get a sweet new dungeon system to look forward to, in my opinion that already surpasses my expectations for the expansion, as I already know raiding will be about as solid as it has been in the past so I don't feel like I'll be disappointed there.
Now I'm not against casual content and availability of content to everyone, but, and I can't stress this enough, it's the "I'm a casual player but I'm entitled to everything" mentality that drives me insane. Just like in real life either you put in the time and effort and get rewarded or you don't and get nothing, simple as that. But if you don't feel like putting in the time and effort you shouldn't expect to have access to everything either.