It's easier to get seated in the EKKO driver/passenger seats by entering through the cab doors, than from the coach. The TV (if optioned) is mounted forward center over the cockpit, facing directly rearward, with no comfortable viewing position located in the coach. Another shortfall. The batwing awning is useless, IMO. We'd never use it. The space where the outdoor kitchen is stored makes a nice litter box storage area, as demoed in the FitRV video. I doubt we'd use the outdoor kitchen either, but that one's still under consideration, if we could afford one.
We'll keep our Sprinter for now. I've modded it to where it's comfortable for us, and it's already paid for. We get around 15mpg solo, 13mpg towing. Keeping the speed reasonable around 60mph, give or take.