I hate to see you having these issues. Weve got a 2017 Shadow Cruiser 240BHS which is a twin to your MPG and I think there have only been 5 things to be corrected and none were major..Ill have to take a closer look at my front cap and suspension tomorrow just to see if there's anything wrong that we've not seen yet. Weve got a few interior trim pieces that have come loose/broke, TV was connected to the DVD player wrong, the under dinette LED lights had a bad crimp as did the charging center in the bedroom. Dealer fixed the under dinette lights and 2 trim pieces. I fixed the other trim with wood glue and staples along with the charging center wire and the TV connection(just had to move RCA plugs to the right plug).
Good luck in getting it taken care of.