If I create a layer that I want to function as an alpha over all layers, it's easy with the old blend mode selection.
If I want an alpha to only effect certain layers, it would make sense to drop that as the top layer in a group. However, that alpha effects all layers below (regardless of within a group or not). Would be great for that alpha to only effect that group!
Further, Stencil and Silhouette Luma work great, But where's Stencil Alpha? Obviously I can invert, but that's one extra step