Well, opting out of the MSQ isn't something I'd choose to do because I enjoy the story. So, I'm not keen on that idea, personally.
Having played WoW where the need to level characters traditionally has largely been ditched in the interests of convenience, I'd worry that introducing something like this would damage the game.

Two things would make this game more alt friendly are being able to send mail between characters on the same server and allowing alts to share a private house. Those two changes alone would make them much easier to play.
I've always had alts in other games and I've made them here too, but they don't get played very often largely because of the mailing restriction. That's the one thing I'd like to see changed.