The ability to switch between game modes at will has been promised to players since the beginning of the Kickstarter. Frontier have shown no indication (at all) that they would even consider changing that feature, especially given that is forms the core of "And the best part - you can do all this online with your friends, or other "Elite" pilots like yourself, or even alone. The choice is yours...". The genie's been out of the bottle with respect to this game feature that to try to bottle it now, over five months after game release, would be very, very unlikely to be met without significant displeasure from a significant portion of the player-base.
You mean from the traders, separating it could still work with separate saves which people have suggested before, this would allow community goals to acturly be affected by players from both sides, if a goal only is there for one side the other tries to slow down or prevent that goal in open say its about transferring items into a station, soloers can avoid it where as the guys trying to stop it from affecting there opinion and wish can't do jack because there is no other option that what they are trying to do in open.