Electrical issues 315 RLTS

There are too many different things on a single fuse. We had a short in the awning wiring on the slide out. This also effected the refer, lighting in slide out, and some outlets, all on a single 15 amp fuse! Another issue is when the heater comes on, all of the lights flicker. We absolutely love our floorplan, but I’m concerned about future electrical problems. The dealer had to take one of the walls apart in the slide to fix the short in the awning wiring. This ended up taking 3 weeks, and missing one trip. Not sure why they don’t put wiring in conduit. I think there should be code requirements on these RV’s, just like homes, for the price we pay for them.
Anyone else having electrical issues?