I don't think the goal of a new league should be to attract old players that left the game, they left the game because they got bored of it/busy in life. No league will change that, that's a false assumption in my opinion. When we have a BnG league people like Dw33b, al2cane etc. come back? Doubt so.

If it's up to me, all schemes deserve their own league so people can purely decide on their taste what they want to play, to play competitive TTRR you will have to play BnG/Elite etc. because people can/will pick it against you. So yeah, I am for a wide variety of leagues instead of this one allround league.