As I said:
I also don't see why a Feature not being there should cause a fail, as long as that Feature is not something very fundamental like Controlls, Graphics or Audio.
It will fail in the aspect of an MMO, without socialization and support for such and MMO's driving force - Population - will be minimal. Thus sales will be minimal, thus unless the owner of FD just wants to smash his fortune into ED's development (which he might), the game will fail financially. However as a single player game it'll do just fine provided they severely up the content, like.. on the level with X3.
Otherwise, yea eventually it is highly probably it will fail. Not guaranteed, just highly probable.
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Just because ED has a fan base does not make it immune to the riggors of the gaming industry, a lot of other games also stated when they first came out "We will not Support Guilds", and some of them had fan bases just like ED does.
Guess what? After being in the MMO market for a year or 2, and continually losing players and financing because they lacked in depth in game social structure support (IE guilds/Corps), they either
A. Added Guilds.
Or
B. Closed their servers and went out of Business.
Players are Consumers and a developer can want whatever they want, but when your consumers and the market goes... "Hey, yea um you need to add guild support to your game or we wont purchase it..." You add guild support. (Unless you have money growing out of your eye-sockets like Dave" in which case you make your game the way you want, and if people don't like it they can go F themselves. Your game would still have a low pop however. And would never be what you really designed it to be and do.
if you want pop, and you want sales, and you want consumers, Then you do what you need to in order to get them, while maintaining as much as possible your original idea and plan.