In the case that more voices would help: I would love 6 person leagues. AAA baseball teams don't play single A teams for a reason. Half of my schedule in GDL is games I can automatically pencil in as a loss. There isn't much intrigue to a 24 person league, we already know the handful of guys who will be competing to win it all.
If the size of the active playing community were larger this wouldn't be an issue. Do guys see this community existing in the next 5-10 years with the same subset of players? There should definitely be an attempt to foster growth. We gotta keep the new players invested.
On a personal note, I'd be stoked to be in a small league with guys in my skill range like Aqua and JV. Those guys get their games in!!!