Back to your original question....
For me - the ability to have the bunk system in place now with kids (15/10yoa) and then convert to a lounge/eating area would be important. So you don't have to sell to buy a more suitable layout.
Flexible interior designs that can move with your change of circumstance and needs with very little cost and effort - e.g. Maybe have the plumbing fitted and ready to do a retrofit bathroom for the same reason if you then want to do the whole travelling thing rather than a week or two at a time.
I like the pop-top design of AOR which gives a better sense of space and light inside, but I also like the amazing external kitchen facilities of the Complete Campsite and the amenities tent folding out under the hard top roof swing out. Would like to hear from those with the CC as to the functionality of the half-lift top. Looks weird and maybe a little 'cheap'?
And - I still can't believe when you're spending around the 6 figure mark for a '2/3 sized van - compared to the general caravan market - that you have to option to get A/c... Rarely do you see a CC with A/c. Why? Is this to do with the sloping roof design or just the extras list cost? AND, a lot have the most basic steel wheels. Really?? Again, most of your Jayco's come with cool modern alloys and can be half the price.
The big appeal is not needing towing mirrors... that's got to be a plus - right?
So: Weight (including tow ball), Flexible interior as you're generally talking 12-16ft, Great external kitchen, Basic internal kitchen to make a cuppa or just get away from the elements for a bit if too hot/cold/insects, Manoeuvrability and Quality fit out. Very fast set up and pack up. And lastly, if away for more than a few days to have an annexe to create a separate living area for sun and rain protection and socialise with your mates.
Don't want much do I !!