If you support the "online only" decision, please read this before posting: for many of us, the issue is not internet connection. Sure, that is a deal-breaking problem for some unfortunate folk, but it's not all. What bothers a lot of us is that:
1) We want to be able to play a game that is in no way affected by other players: my money, my spare time, my game, my universe. And, if I choose to, my mods and my rules. Should we ever feel like having a gaming experience that is influenced by other players, it has to be our choice, not FD's.
2) We feel cheated by the way this was handled by FD. We understand that plans can be changed, but a change as massive as this cannot have been decided mere weeks before launch, and worse still, it cannot be just nonchalantly mentioned in a newsletter entry between things like "feature X will be added post-launch" and "we're really happy with the way things are going", as if it were a minor detail that is barely worth mentioning. It isn't a minor detail, and the fact that they are treating it as such makes it even more aggravating, because they couldn't possibly not know that this was going to upset a lot of people.
3) We are rightly worried that the game may change over time, depending on the fluctuating fortunes of FD. Just ask the fans of vanilla WoW what they think of all the changes Blizzard made to the original game.
4) We want to be able to play ED for decades to come, just like we have done with the other Elite games. With an online-only mode, the game's lifespan is intrinsically limited to the servers lifespan: if FD goes bust, so does our game.
5) We want to be able to pause, resume, play at our leisure, without things changing while we're gone. Our reasons are our own and they are as many as there are people complaining in this thread, probably more, but mostly it's due to the fact that we are adults with real life priorities, and we feel the game should be playable and enjoyable not just for the hardcore gamers who can happily play away six to twelve hours a day without a care in the world, but also for those of us who only get to play in short half-hour breaks, or less. This is not an unreasonable request, it is simply the standard for all single player games, and this game has always promised to have a single player mode (or are we going to ditch that too now?).
So, dear "onliners", feel free to criticize those of us who are complaining, feel free to defend FD to the bitter end, but please, in the interest of constructive debating, refrain from posting things like "why do u care its 2014 every1 has internet access lol", because that only covers one objection among many (and rather poorly at that). You want to explain to us how wrong we are? Great! But please address all points that are being raised, don't just tackle one and ignore the others. Thanks.