Good point Felix on public learning as well as one person.
SouthWest, one of the things I learned (mainly from Fr. Bill N4Gix) and from customers and downloaders that wanted to repaint my work was that the more easy it is for people to paint, the more they will paint it, the more repaints will show up, and the more successful or famous or popular your work will be.
I used to have fuselages that were flipped upside down, broke into pieces, etc. Fr. Bill set me straight on those and now my repaints are super easy to do.
Every tried to repaint a fuselage where the back left side is pointing up! (rotated 90 degrees CCW) the right rear side is mirrored (backwards) and level, the right front is upside down, and the left front is normal and rightside up, and the left engine nacelle top isnt mapped the same as the right engine nacelle and has a different scale (size) of vent door on a missing area of the nacelle, located on another area of the bitmap?
Try repainting the FS9 Cessna 182 or the Baron FSX. eeeks!

Same with the Airbus and Embrarier, having their doors on a seperate bitmap, you must match paint schemes and stripes to the door panels on another sheet. Very difficult.
Its easy for a developer to figure out, but for a simple painter guy, its a sophisticated puzzel that will take him many many hours instead of say 30 min's.
Bill