Also with the 100 people render or even if they kick it up to 150/200, most of the time when the server is done this way, you can see an entire party group of players that are together but would have to remain in party. usually when a player leaves said party, they disappear to another shard or no longer is rendered with the rest of the party they left. in WoW you actually see players phase away when this happens, which is about the same way you would probably see them in starbase, its also same for ESO.
So that adds a new element to the problem as well. Would each ship owner who is docked together not only have to be on at the same time as well as be in the same party to ensure others would see the mobile fleet station as a whole? a lot of factors here but all in all it boils down to MAYBE! until we are in the game and probably closer to actual release will we know the answers to these kind of questions.
Most people get into games because of the friends. That is a fact. As for the rest of the statement, well, dude, this is what an MMO, "Massive Multi Player" game is, check out all the classics. Everquest,
WoW, ESO, GW2 and many others, you can solo level and solo quest, but you cannot solo heorics, raids, battlefields, arenas and most importantly WPvP. Ark, your number 1 survival in Ark is numbers. Ask the Chinese and Korean players who flood a server and wipe it clean. Rust is no different, and from what I know about Eva, so is it. Solo players are always going to be at a disadvantage in any MMO, they are literally not designed to be a solo game and that's a fact, hence the MMO part, just ask Kirito.