Ted......It was making me crazy. Not only the slamming, but seeing the wall move from slamming it. If you open the door and take a look at the lock in the door, it has two positions. Push the lock mechanism (circular metal that grabs the bolt on the door). It will move to a lock position and if use push it some more it will move a smidge to a second click that locks/closes the door flat/completely.
After realizing this lock had two positions to full close, I tried something new when closing the door. As I close the door firmly, not slamming, I simultaneously pull the handle (door opening handle) out slightly and pull outward on the lighted grab bar. It takes a little coordination, but the door will close perfectly.
When we get ready to drive, I sit on the floor inside and pull the door shut firmly, slightly lifting the handle on the inside and pushing on the wall next to the door. This will close the door flush.
This all sounds like a pain, but what I found is that when the coach is not being used and stored at home, I use this method for closing the door. This has slowly made the seals seat better and now the door closes better, without slamming.
I looked at adjusting the floating bolt on the door frame ("star" adjuster linked in above post), but on mine, the ENTIRE door frame has to be removed to make the adjustment. The hole in the door frame is not large enough to remove and adjust the "star" adjuster
I spoke with the tech at my dealer and he said they typically let the doors seat for several months and don't adjust them.
As I said, making sure it's closed all the way when not in use has started to resolve the issue. I suspect another couple of months and mine will work properly. I suspect the Essex and King Aire don't have this issue and is something Newmar should address. There will always be things that aren't as nice in the lower level coaches, but things that you use everyday and that can become very aggravating are issues every company should address.