I am afraid I kept Colen busy in the 4E forums
so he did not make it to this one.
SAGA was the steping stone to 4E Lead on it helped start 4E and then jumped back to SW line to bring in Saga which in essance it the bridge between 3.5 and 4E addition, smaller skill list (somewhat) tighter class features, tailored feats, more hit points and leveling up is very 4E when you look at it. My brief overview.