Casual player suggestion: Self-found Squad mode

Really loving the playing with a small group of family/friends, and hoping for a mode that rewards just sticking with a small unit. The self-found mode feels too restricted while playing with others, treading lightly when items drop is somewhat annoying. Trading with the general population feels like a game within itself.

The endgame map also feels very solo player heavy, it would be cool in this mode if everyone in the squad shared one end-game map.

What exactly would be a squad? It's kinda like a guild, but perhaps more restrictive. A squad will be formed when the mode is chosen on character creation, it has a limit of 6 members. A squad is separate from a party, players can still play solo in a squad, form more than one party,etc etc. You can trade within the squad but not between other squads/players. Once a squad is formed the characters from that squad can't leave. New players can't join the squad once the squad is at 6 players. If a squad starts with say 5 players, another player could join that squad but must start at level 1.

Never really played PoE 1, so not sure if this is what a private league is exactly.