While we preferred the woven wood blinds in our 1990 Bounder, the Day/Night pleated type are not too bad. In our case, once the tension was adjusted to our satisfaction, we've had no problems with the shades themselves.
On the other side of the coin they suck because the trim that the mfg's place around them makes operating the shades and the sliders impossible.
The Venetian blinds in the kitchen and bathroom are just a pain in every way imaginable and they are dirt catchers and they are noisy.
Now, is it possible to build a really great RV window shade? I don't think so, there are too many designers of RV's and too many shapes and positions of windows to make one shade that will serve every interior designer, manufacturer and owner.
In my opinion there are no quick fixes.