I most cases, you can simply disconnect the plumbing and hardware, remove the sink and pop in a direct fit replacement. No need to change counters, etc.
On our model, the '14 & '15 years have dual sinks, and the new ones have single basins. Some of the folks are working out trades because they want one or the other. I initially wanted a single basin, but decided later to keep the dual basin because you can fill one side to do dishes with using less water. That's important to me when I'm boondocking.