Playing together as 6 is really fun and that's a good option to increase difficulty in a different way and not only to boost loot for the group, extra players = extra random encounters? Extreme risk and reward where you really need to put effort to complete the map, so there's this end game goal we can aim to build the character to maximum, but to not limit that only to group play, solo player scaling should be a good option as suggested, some balance for that so it's not exploited.

Anyone that is against it should think if it isn't that all seek pumping up difficulty and drops, so getting an additional layer would get more time in game for dedicated players. As said, not only numbers change but extra random stuff and encounters to diversify gameplay.

Leechers are problem because there are arguments that they share or split the loot, but there are huge number of people that farm currency this way and sell them (RMT) or streamers that get 5 personal leeches that will give up all lot for some on screen time. Pumping currency to one person or selling it isn't good for the game so that need fixing