This is actually two ideas but closely related so thought I would bundle them together.
In ArcCatalog it was possible to set the field alias and apply domains in a single interface, in the feature class properties:

I have just noticed in Pro's equivalent Data Design=>Fields that this function has been removed:

Notice though that Pro still displays these alias and domain settings, so not sure why this wouldn't be supported in data design?
Pro's Alter Field and Assign Domain To Field tools can alter registered views field alias and domains.
So my idea is, please add the ability to alter the field alias and domain for registered views using the Field Data Design form. Pro supports registered view field alias and domains so it makes sense to me to edit them here.