It is more and more common to work with masks in Premiere these days. But the UI and work with it in Premiere 2020 is still very old fashioned compared to After Effects masking. So I suggest to overwork this as soon as possible - mentioned here is the stacked view, which is pretty useless, when you work zoomed in and try to paint a mask. Even rotating, rescale or reposition a mask is a very tedious task. So I´d suggest to make masking and mask effects easier to work with.