Well...yes, we could add it of course.
What I fear is the scenery customization page will, at some point, become so full of options, that will be basically a replacement for ADE, to fix and override all mistakes scenery developers put in the scenery AFCAD.
At that point, if that page would become as feature-rich as ADE, wouldn't be best if you just used ADE, and fix the AFCAD directly ?