Without a good concrete example, this sounds like a terrible idea.
Scale -> basis makes no sense to me. The scale climbs up and down, like how you scale a ladder. The basis… does not do that.
Tonic, dominant, subdominant are used mostly in discussions about functional harmony. The biggest reason why it would be a total disaster to rename tonic -> primary is because we already use the terms primary and secondary here! For example, V is the “primary dominant” but nobody actually says the word “primary”. Primary chords are taken from the scale of the tonic, and secondary chords are taken from a different scale. So V/V is a “secondary dominant”.
Scale -> basis makes no sense to me. The scale climbs up and down, like how you scale a ladder. The basis… does not do that.
Tonic, dominant, subdominant are used mostly in discussions about functional harmony. The biggest reason why it would be a total disaster to rename tonic -> primary is because we already use the terms primary and secondary here! For example, V is the “primary dominant” but nobody actually says the word “primary”. Primary chords are taken from the scale of the tonic, and secondary chords are taken from a different scale. So V/V is a “secondary dominant”.