Revise the effect control masks.
It is incredible to me that Adobe that brings us Photoshop and After Effects has the almost unusable mask controls in Premiere Pro. Did you talk to your co-workers in After Effects? I cannot think of a more unusable masking implementation in any software that I have ever used that is so clunky. Almost anything would be better. How about letting me scale a rectangular mask symmetrically to make it wider or taller without the ridiculous steps this requires. Adobe user since 1998. Please correct me if I'm wrong.