I don't think it is a matter of entitlement. I think it is a two-fold issue that has nothing to do with entitlement.
The first issue, however inadvertently it was created, is that we were given HOPE! After a long period of having nothing to hope for and accepting that situation, a flicker of hope was give when there was a started and quickly failed negotiation. To the faithful, it was quite painful to honestly entertain the possibility that our beloved game could return only to have it dashed. Then, just when we had finally accepted that hope no longer existed, word of another (and much more promising) round of negotiations, and even though we were hesitant to believe again after being so recently disappointed, we did so. I tell you, and I don't think anyone would disagree that nothing plumbs the depths of despair more quickly than having hope, and seeing it die. Much more so than never having had hope at all.
The second issue is that because of the lack of information, none of us can make any sense of the (pardon the pun) endgame, and we all very much want to be able to make sense of it. Based on the few facts we did get, it makes absolutely no sense to anyone regardless of their business acumen, to withhold a property whose market value fades on a daily basis, and once enough time goes by, not only will folks stop caring about the past game, but the successor projects will start to enter beta testing, giving them something to hope for that NCSoft cannot take away! Then, the old game will hardly seem worth it. They just cannot reconcile these things logically, and most of us possess the ability to view things logically, even if there are strong emotions involved.
So, between having hope given, and taken away, then given again and feeling it fade day by day - combined with the lack of understanding any of us have, due to the NDA, for why the hell anyone would sabotage their own potential profits by standing on ceremony, or whatever they are doing to prolong this deal, there is understandable frustration that grows daily. We don't express it every day, but we all feel it.
For the folks that complain about the complainers, please bear in mind that the very reason any of us are here at all, is that we are passionate about this game. You cannot have that level of passion, and not have some fairly powerful emotions about things that govern whether you will ever experience it again. Especially when, because of the lack of information, we cannot form an educated thought about why things are as they have been for so long.
I don't think we feel entitled. I think we have been teased with hope over periods of time, and because of our love for the game, we feel stung when we have little to no reason to maintain that hope.