First, I really like the Newmar product from I've seen in person and on their website. Newmar is near the top of our list if we start looking for a new coach.
Our current coach is all electric and that's exactly the way we ordered it. I only wanted ONE fuel to deal with. We have the Aqua-Hot heating system that uses diesel as does our Onan generator. We also have electric heat pumps on the roof and we have the duel electric on our Aqua-Hot system.... so, if it's not too cold, I could heat with the electric on the AH system.
A fully electric residential fridge is awesome. Ours is a Jenn-Air with the ice and water in the door. It stays on virtually 24/7 as we have 8 house batteries to keep everything going. I boondock once a year in Quartzsite with my RV group for 5 days off the grid. All I need to do is run the genny for 2 hrs. in the morning and 2 hrs. in the evening. Works perfectly with the breakfast and dinner hour.
Personally, I would have no use for an extra freezer, I would rather have the storage space. So, others may chime in on the importance of an outdoor freezer.