We have a 2014 377XL, and we'll be needing new tires on the front in the near future with less than 8000 miles. My dealer is trying to get Forest River to pay for the alignment at least, because I mentioned this to our dealer after our first trip, but it was never done.
Check the forum discussions about needing an alignment. It seems that Ford doesn't do an alignment because they don't know what the final motorhome will be. This is not a normal warranty issue, but many owners mentioned that Forest River would pay for an alignment within the first 90 days.
We're going fulltime once we sell the house, and may get a 5th wheel some day, but we love our Georgetown and plan to keep it for a few more years at least.