Here's some of the changes we've made so far:
1) Made a cover for the stovetop for more counter space. The top is ceramic tiles with cork around the perimeter. If you turn it over it doubles as a serving tray.
2) Drilled a finger hole and made a prop rod for the lower bunk storage area:

3) Added a bungee cord around the TV to keep the screen secure during travel:
4) Couldn't open the dinette storage compartement easily as the back cushion overlapped the storage compartment cover. Cut off the compartment cover so it would bypass the cushion.
6) Found a perfect little stool for easier access to the top bunk.

7) A wireless indoor/outdoor thermometer lets you keep closer tabs on the fridge temp.
Other stuff: added a second set of stabilizing jacks to the front of the Rpod, bought suction cup hooks to hang wet jackets on just outside the door, use suction cups to hold the Rdome flaps to the side of the Rpod rather than drilling into the side.