I see your point, i guess you might be right. However i don't feel talking to other playes is immersion breaking, quite the opposite. it makes the galaxy seem alive, regardless of the message content. Im not an RP'er and i fully expect if we were all flying around in spaceships in reality, people would still use text chat to communicate.
I do see the point you made about people backing the game and what they were buying into. However you talk about money and the amount of people playing the game, but there is a flipside to that coin. Nothing will kill this game quicker than a lack of multiplayer interaction. Once the cat is out of the bag, and it becomes known widespread that the game is really aimed at solo players it will just fade away, new people won't really buy and play, and the players who do play open mode will likewise get bored and quit. Leaving only all the solo players.
I don't know how many backers there are, but im sure that even if ALL the backers preferred solo play, they still wouldnt be enough to keep the game running entirely on their own without fresh blood and players to draw funding for future development.
I also have the feeling that a lot of backers and loyal solo players are in fact more mature gamers who have not yet encountered be more massively multiplayer orientated gaming industry we currently have today. I am a mature game also, but have always played video games. I didn't just play elite in the 80's or frontier and then wait for this game to come out. Lots of people have had to embrace the fact that multiplayer is the future of gaming. Its in everything. Its also quite fun when you do it right which this game could easily manage. The problem is you don't find that out until you try, which a lot of people just don't seem to be willing to do and even if they did, the features aren't there yet for it to be fruitful.
Eh, in terms of immersion, it will likely have to be an agree to disagree thing. x3 When the message content makes it clear that the person is just considering themselves as a guy playing a videogame, my brain sort of goes 'Yeah, okay, back to reality I guess! u.u '
Anyway, I do see what you're saying with regards to the risks in multiplayer faltering, and I do agree. However, the solution isn't the removal of solo mode, because you're basically tapping an incompatible resource. As I said, not only will players who are there out of disinterest for multiplayer continue to have that disinterest, but this game is in a fairly unique position of offering plenty of options to avoid it completely, even in Open Mode. Now, MAYBE they won't get phenomenally ticked off at having the last sliver of the original thing they backed taken away, (a single player experience,) to the point of leaving the game altogether, if not demanding a refund. And MAYBE they won't immediately hurl themselves into the depths of space in hermithood. And MAYBE, during their brief trial run around other players, they will find it's not so bad, (though with the less enthusiastic ones, you know it's just going to take ONE jackass blowing up their T7 full of Gold to make them go hermit, given the loss is literally in the millions.) But at the end of the day, what little portion remains after all those eliminating factors are taken into account won't be enough to save or doom the game one way or another.
I think a focus should be made on creating positive, social experiences outside combat that can lure in players. You have to admit, though one doesn't HAVE to shoot people, there isn't much to do beyond shooting other players, or chatting with other players. The latter can be done here in the forum, generally with greater eloquence and descriptive language than brief messages that might be typed in between maneuvers. From what I've heard, even trying co-opping instanced battles is buggy and unreliable for some people when they try playing together. If they can get a move on in terms of ship and station interiors, it would help, giving a common meeting place for players.
Also, one thing Eve did very well was developing an underlying metagame. Player created, run and developed factors, with clashes for power and politics, facilitated by mechanics designed to ALLOW far greater player cohesion than we currently have. If ever they made it possible for groups of players to claim uncharted territory in the unexplored galaxy, securing systems and planets for themselves, and then battling one another, as well as the established NPC groups, for dominance in their little kingdoms, that has the potential to create the same kind of game attachment that Eve Online has. Unfortunately, the mechanics are nowhere near capable of making that a reality, for now at least, and with player interactions so clumsy and hit-and-miss, it's just hard to get really INVESTED in the idea of dealing with people, because it's often this temporary, almost meaningless thing that at best might be amusing for a bit, and at worst might leave your ship full of unwanted holes. xP
Right now, put simply, the game needs more mechanics that support positive and beneficial player interaction; removing the choice of Solo isn't addressing the underlying problem.