It can be very hard to find someone in space if you are not inside the popular systems. People are mostly forced to stay there because if you move a little you are totally alone except for npcs. You can be in a system that sees hundreds of people per day but never see anyone in a 6h sitting. Removing instancing or more realisticaly greatly increasing the number of players per instance would lead some people to move away and seek other homes, other trade routes, other conflict and other system to fight for their faction of choice.