I could see that being an issue if you had a ton of gear with you. I set up a small pup tent and store the gear in there when I am sleeping in the E.
My reason for sleeping in the Element isn't for those locations where we could/would be able to set up a tent. When we camp, we do it with enough gear that we'd need the space utilized for laying down the front seat backs.
I'd like to be able to sleep in the Element on cross-country trips at rest stops for a few hours, or if we get to a campsite site late and it's raining.
We can pitch our 11x11 dome and set up a comfortable basic sleeping campsite in under 30 minutes. For two adults of our age, sleeping on a 39x80 air mattress apiece and being able get in and out of a tent without bending or stretching beats sleeping in the Element.
Sleeping in the Element isn't an ideal solution for us as a couple; my wife has difficulty getting into the back even when it's configured for passengers, I figure I'd have to rig up some kind of step stool and extend the grab bars for her.
So, my goal for a platform is to house our non-sleeping gear better, possibly incorporating a camping kitchen into some of the modules. Being able to sleep on to of it ids a bonus.