How do you know that? Did your MEC tell you that? Oh wait, they haven't told you anything because they haven't taken the time to actually find out!
I don't need my MEC to to tell me. I understand enough about how different PBS systems award to understand the logic of the system. Why don't you tell me how SmartPref does NOT award on the same logic as Carmen and AOS. The front ends are different but the actual engine that drives the final awards are based on the same philosophy.
While work rules are important, what you can NOT regulate is the basic award logic that they system is based on. If you suppress how high the global constraints go, you are effectively handcuffing the system with NO way on the back side to get an award that will work. You simply have to accept that SmartPref in bases such as EWR, will have a globally constrained group that will make HALF your line holders. It is in the videos on the Crewing Solutions website.