I have to say, if someone's willing to deal with the giant pain in the ass of managing four clients to try and retrieve drops I would just call that dedication... Boring, lonely box hunting and a painstaking use of time. If someone really wants to be a literal box vacuum rather than playing with others I would not call that cheating. Powering on through quests with a team would seem just as productive.
The players at the advantage of the individual drops are the everyday players who can't make it through quests by themselves. You need top gear to do certain missions solo for hunting, and quite frankly that is boring. All the drop splitting will do is allow a more diversified group of people to earn rares. It would take some balancing, but could be a fun project for Soly when there aren't major events going on.
My one question for Soly would be is there a way to opt in? Kind of like *insert shitty lee server name here* used to allow you to choose between PSU and BB drops (random or to the player who finds them)? If not, how would this affect the drop rates for single-player missions?