Well, they aren't "echo(ing) the things that you said" but they are providing some ideas.
I altered a previously used illustration to provide an idea of what I'm envisioning. The rendering is a little off but you get the idea (that's what you get for using MS Paint). Everything visible is going to be 3/4" square tube. But, I do recall having some 3/4" round tube in my scrap bin. The scrap tube provides two things; 1 - a finished end that's properly crimped with a hole for the seat bolt and 2 - the round tube may provide a little more clearance for the side panel. Also, you can see, in this illustration, that the turn signals are mounted on a separate tab. That's not the case on my NX. On my bike, they mount where tube, from under the side panel, "T"s into the vertical rack support. I plan to weld a small piece of round tubing onto the rack support (just below that intersection point) so that the turn signals will pretty much be in their stock location.