I'm not a huge fan of the term "tertiary attraction" because, as stated above, it does make it sound like it's not quite equal to romantic and sexual attraction. At the same time, I don't have any ideas as to what we should be saying instead, so it will work for now.
Personally, I experience platonic and aesthetic attraction the most. I often see queerplatonic attraction treated as a synonym for platonic attraction, and I appreciate that they are differentiated here. I very frequently will experience platonic attraction as a desire to be friends with a specific person, but that doesn't mean I want to be in a QPR with them, so I appreciate the distinction.
I also agree that grouping them together is a good thing. They aren't the same, but they're treated similarly, so hopefully if we put them under one umbrella it will make it easier to advocate for all of them.