The scope problem can be broken down quite simply into two questions.

What would happen if Delta tomorrow gave Skywest another CRJ 900 in DAL colors?
What would happen if Delta tomorrow gave Skywest a 747 in DAL colors?

In the contract legal sense, both are the same violation of the section 1 scope agreement since DAL is maxed out on the 76 seat RJs. However, both are not seen by the pilot group as being of the same weight. This is where the root of the scope problem lies. It is something no union has the ability to fix.