Ground effect lights not working. - If both sides quit then it's possibly a loose wire at the switch. Did you check?
Ice maker not hooked up. - After reading several posts on this subject, it appears it's not hooked up at the factory, If a person wants it hooked up, either the dealer does it or it's done by the owner.
Theater seats rubbing - If your seats are like mine, they are screwed down to the floor with the center section floating. They can be unscrewed and adjusted.
Fire place stoped working - Yup, mine did too. Dealer replaced it.
Customer service sucks - hmmm.....that's quit interesting. From personal experience, that's not the case. From what I've read on the facebook groups, it's and extreme rarity someone complains about customer service. Tell us more.
Before our 340RL we had a '14 Montana High Country. I had it in the shop on several occasions. The first 2 times were to fix a total of 16 things. And 2014 was before the camping rush.