You say this like it is fact. You are assuming. We know little to nothing about EAs content plans for the program. We don't know how often the plan to refresh the vault content. We don't know if they plan to keep content in the vault or flush it with each refresh. We know essentially nothing except that these are the titles it debuts with. The difference is you are assuming best case scenarios and legitimate consumer value out of a company that is notorious for it's willingness to exploit the consumer. Logic would dictate that historical precedent overrules warm fuzzy feelings and happy thoughts.
Sure, you could be right, although I really think at this point people may just be searching too hard for ways to make it seem less appealing. And so far the news has all been quite positive. I mean, what exactly do they gain by flushing the existing list of titles anyway? What, will those flushed titles suddenly start selling gangbusters at retail again after the fact? Flushing is completely counter to their objectives and the long term success of the service. What if someone subscribed specifically for Battlefield 4 and FIFA 14 only to see BOTH wiped from the vault later?
The more they add to the "vault" the better their service comes out looking over the long haul, and the easier it becomes to make sure people maintain their subscriptions. Not flushing would also be a pretty great way to make it even more appealing to newcomers, which will lead to more new subscribers. If they're going to flush anything at all, it'd make more sense to flush games like FIFA 14 over time, replacing it with FIFA 15 making sure only the absolute latest edition of the yearly sports titles is available, right? Not exactly.
The problem with doing even that is they (EA) could then potentially be directly interfering with people's ongoing gaming enjoyment by doing such a thing, and that obviously defeats the point of the service. What if someone is in the middle of a career mode in FIFA 14 that they are interested in seeing through to the end, but then all of a sudden FIFA 15 just up and replaces it and now suddenly all your saved data is totally useless. Maybe someone's friend who doesn't have EA Access only has FIFA 14, and the only way to keep playing with that friend is to play FIFA 14 instead of 15. EA Access has to be able to accommodate all these situations, which is why I think the vault list is just going to keep growing without any flushing. As unlikely as it might be to believe, the service really might end up being just as good as it looks without any secret gotchas.
Why on earth would you subscribe to those if there were only few games you want?
People really only want access to or use a subset of the entire Hulu, Netflix or HBO Go catalogs, does that then make those things pointless? Not at all. Having access to everything else is a plus. There's a major plus in knowing you're able to try everything. You may end up liking things that you didn't even expect to enjoy. As these various game vaults grow, you could have yourself quite the collection of games that you didn't even pay full price for. Sure, there may be a number of games there that aren't your style of game, but the idea of it is something that I find very appealing in the videogame space. It's like being in the game section of a store and being able to unpack and play whatever you want whenever you want. On a publisher by publisher basis, but you get the idea.