All of the features on the Adobe XD softwares are good, and helpful. However, I would like to suggest adding a search bar, in which we can search for a specific feature (for eg. if we type 'Mask with shape' in it, it will show us that feature, and clicking on it, we can apply it to the required object). Not just for XD, but i think if it is there for Photoshop and Illustrator as well, it would be a very convenient tool to use.
However, this is to be along with keeping other tools at their place, as we would have 2 options to go to a feature then.