re: When will leagues start going with the 2 QB format?

We have always had a 2 QB system in a PPC league (point per completion). It is fricking awesome is all I can say. Points flying all over. I will say, it would be tough for a league with over 10 teams however. We have 10 teams and cap it at 3 QB's per team (obviously). 12 team league x 2 qb's = 24 qb's. Only 8 qb's left for bench spot for injury/bye wk. It pretty much impossible over 10 teams. You are right, it does change the draft strategy completely. In the first two rounds (snake), I would say 8 qb's are taken.

Brees
Manning
Rodgers
Romo
Ryan
Stafford
Luck
Rivers

All in first 2-2.5 rds typically. Guys like Dalton, Ben, Cutler are very valuable as no.2's and that's where the advantage comes in as far as 2 QB system. Generally everyone will have stud at no.1 QB spot, so the no.2 is where you gain the advantage if you have a top 15 guy.