I have to admit, I'm not all that motivated to read that thread.
You might ask why. You may not care.
What it boils down to is: I want NEW THINGS. I don't want changes to old things. That isn't going to do much to create new things to do in SK. Dual membership appeals more to power-gaming and PK than it does to RP. I can RP a dual membership now, if I wanted to and had a decent supporting cast from the other cabal/tribunal.
I can't RP a new class without making myself look like a fool.
I'm going to continue my campaign for new and fresh ideas in 2007, not old and/or revamping ideas for existing things.
NEW FOR `07! Standardized armor, the alchemist class and spheres of priest magic!
EDIT: Fixed big red typo.