Marti- Disclaimer: I am not a licensed electrician.
The number of outlets on a circuit is not the issue, it is the power being used on that circuit at any given time. Too much power used at one time may overload the circuit. Therefore, it is fine to add outlets to improve location and convenience, but a bad idea to add outlets in order to be able to plug in and use more electrical appliances at one time. That being said, please also note that FF generally uses 15 amp outlet circuits not the 20 amp capacity we are used to in our homes.
On my 2012 FF X-198 FBS, there is an additional outlet UNDER the overhead cabinet directly over the sink (not referring to the dedicated microwave outlet INSIDE inside the cabinet). We also have the inconvenient one you refer to just below the kitchen counter top edge. We use the one under the cabinet regularly and because we plug (example) the coffeemaker UP into the outlet, it keeps the cord out of the way. You might consider adding one in this location since routing wiring inside of cabinets is much easier than behind/inside walls.
One more important thing: On my model, the circuit for all outlets in the trailer is protected by the aforementioned "inconveniently located" GFCI outlet. That is, FF's electrical design protects all outlets (kitchen, bath and exterior) with a single GFCI. You must understand how this works in order to safely add outlets in the kitchen area.[/u]