Should we wait to buy the 2020 3500 Duramax Dually?

Do the 2019's have any issues other than the funky DEF tank sticking WAY OUT on the bottom of the passenger side?

 

One issue that bugs me is the oil pressure. My 2014 Duramax carried 60 lbs at highway speeds. This 2019 only carries 45 lbs. Dealer says the pressure is right. I agree the DEF tank is unsightly down there. Fortunately, my running boards covered up some of it. Enjoy everything about the new truck though.