There are a couple of things my DW & I would change on our new MH. We would go back to the tried & true propane/electric fridge. We have never had an issue with them keeping our food cold. The residential fridge however... not so much when dry camping. We had two brand new deep cycle 6v batteries installed right after purchase. First time out boondocking we were awakened by the low battery alarm. I have since installed two more batteries.
The other thing is changing the power source so both the slide & levelers will function with ignition on or off. One or the other! It drove us nuts trying to remember which was which when we first bought the unit! We got REALLY upset one evening after stopping for the night. We parked, shut the engine off, then tried to level up, nothing, oh, ya, I said. Turned the key on, leveled up, great. Then, tried to extend the slide, again, nothing. Shyte. 3-4 minutes later is was, oh, crap... the key is on! To our deffense, it was on our trip home from buying it in S.C. We were pretty tired from haulin' butt all day.