Congrats on your new bus.
A few things from our list .... some of it requires the picking of battles as there is only so much that can be done in a 8' x 45' space.
* Ample counter space in the kitchen
* Three burners on the cook top. Our old coach had three, this one has two, and we notice. Yes, you can purchase a hot plate but it would be nicer & cleaner if the cook top had three.
* Dual sinks in the master bath.
* Consider the washer/dryer options. The Newell's we looked at had a single stack washer & dryer. They're separate devices in a single enclosure. The moral is that you're replacing both if one goes bad.
* Heated floor. We love ours and it makes a difference.
* Heated basement. At least where the water and waste tanks are.
* Make use of wasted space. In our bus there is dead space behind the fireplace and next to the fridge. We have converted these spaces into storage.
* I wish the credenza in ours was better suited to being a work space. I work out of the bus and pretty much take over the table, which results in constantly moving laptops, etc during meal times. It's an annoyance but that's all.
* Individual control over all shades. Our bus is old enough that the entire front night shades (windshield, living space, and dining space) are on the same control.
* Water softener. We installed one in our and went with the onboard model as opposed to the manual. I'm lazy and I love it. We got ours from US Water Systems
https://www.uswatersystems.com/syste...ater-softeners
* Storage, storage, storage. Both inside the bus and in the basement.
* Did I mention storage?
* Consider how your decisions affect living in it both open (slides out) and closed. It's not uncommon for us to not put all of the slides out if we're only staying for a couple of days, etc. In ours, the slides cover the HVAC vents. Yes, there's room for air flow and the bus still gets to temperature. I sometimes wish that I wasn't sending heated or cooled air 6 inches directly into the top or side of a retracted slide.
* You may not be able to control this but I've often wished that this bus used blue and red PEX to make it obvious which are hot vs cold lines. I get that there's less waste to use all white but if you have the control, it would make later identification easier.
* Individual water shut off valves for sections of the bus. Many buses use manifolds with individual shut offs. This one does not. The difference is that I have to shut off all of the water while working on a specific faucet or toilet. It would be nice to still have water to the rest of the bus so the run to the store could be timed as opposed to "right now".
* Power management system. I'm not necessarily a fan of the systems that will shut "this" down in order to conserve power for "that". However, something that will shut the entire bus down if anything is wrong with the shore power. I installed an aftermarket one from Progressive Industries and it has saved us. Volts too high/low, Amps too high/low, one leg missing, etc. All can cause harm to the onboard electronics and systems.
Hope this helps