Loops are great....I love them and my old layout (Run 255) showcased the fact that loops are good!!
My new layout (under construction) is once again loops (folded dogbones, more interest), but loops neverless.
I would try to include some "on layout" storage tracks, longer passing sidings to store other trains to cycle thru the journey around the layout. It certainly looks like that would work in a few places without winding up with a table full of track.
Looks good, keep us posted.
Donald