It sounds like you and the other EPU writers need to get together, look at the problems with SoS 4 and 5, then beat the said problems with clubs.....

Seriously, does SoS 4 need some extra pieces to round it off? Or is the side trip to the Avatar world a problem? Maybe the set of stories with Avatar should be spun off into a Aria, concerto, or another musical piece? Then repurpose SoS5, picking up those threads from SoS 4?

Craig