Feature Request: Object Mask Refine Edge

The New AI Object Mask tool in Premiere Beta should have an option to refine the edge.  The edges appear to jagged and harsh, even when attempting to use the feather or expansion tools to adjust the edge.  Refine edge would allow support for finer pixels to be included in the mask, thereby creating smoother edges, similar to Photoshop's Select and Mask.  After Effects' Refine Edge Feather Rotobrush tool is more detailed but increases render time.  Maybe a solution similar to Photoshop's Select and Mask Refine Hair feature would be a nice addition to achieve a more detailed edge when using Object Mask.  
Thank you