I know you can view deflections and node displacements, but I think it would be helpful to be able to specify limits and have the program display (in the member status) if any member exceeds the set deflection, or displacement limit assigned to that member or node.
That would be a good function to incorporate in the "Service" type for load combinations: define a live load combination as Service and be able to set it to L/360, and then a D+L service combination as L/240, for instance. Maybe include the option of relative or absolute member displacement (L/360 or 1/2", etc).