Like you (I think), I've always bought new RVs until what I'm considering now.
Beacause of my participation on these forums, I used an extensive PDI checklist on my current RV when I picked it up, spent over 3 hours on it, and had over a dozen nuisance items fixed right then. This has been the best, most trouble free RV I've ever had (had 6 new Class Cs over 27 years BTW).
Regardless, you still hate to hear of such problems on a brand new coach...hope your dealer can satisfy you on these problems.
2005 Bounder 34F Class A - 2013 Honda CRV Toad