Hi Nico,
Welcome to the Heartland Owners Forum and Family. We have a great bunch of people here with lots of information and all willing to share their knowledge when needed.
I can't tell you of any building changes, but the tradein value down the road might be better. You might check the Blue Books and just compare difference in allowance between year models.
Hopefully someone with more inside info will jump in soon. Your dealer did not tell you if there were any differences that he knew of?
Jim M