Not sure what part of the country you are in. The remote start, is that primarily for advance cooling or winter heat? I would spec the CL Lawrence t-vent side windows with screens for ventilation with that many folk siting in the back and for parking in sunny weather.
Are you planning for camping or primarily use this for event (racing, skiing, kids sports activities etc) "camping"? The following comments relate to this question.
How much on board water and grey water capacity? Will there be a back shower - thats a lot of people, also consider refer size for beverages.
will you have enough food and cutlery storage for that many people? Look at providing room for a kitchen box to haul everything out at once for meals. We integrated the pricey but really nice and light Kanz kitchen box in our cooking gear storage plan and love it. we have everything but food in it so no need to keep getting into drawers etc and freed up storage for other things. Ours kitchen box is equiped with enough gear for 6 people (see our gallery) http://www.kanzoutdoors.com/field_kitchen.html
Propane stove or diesel? consider deleting this to eliminate propane system and for some counter space if you don't think you will be cooking indoors much. Use portable 2 burner outdoors.
We had them enlarge the flip down doors on the rear door cubbies to max size so they were useful for putting gear etc on while getting organized for some activity. With your rear galley it looks like the back doors will be utilized a lot so think about what you are going to put on the back. And where will all the sleeping gear and tent(s) go? PH roof rack?
For added gear storage you may want the move the spare to the back for a storage well.
With that many people think about organizing storage dedicated for each persons gear.
Add the rear back up camera - have it mounted high, not at plate location to observe your tow.
Add maybe a front hitch for a bike rack if you are towing a race car unless the trailer has room for them.
ps: wished we had put black aluminum wheels on ours instead of conventional aluminum finish. It would look better with the black fender trim and side guards. See OutsideVans website for sleek exterior look ideas.
We also put a key pad entry on the passenger door instead of the driver door so passengers can get in and out without needing your key fob. If your the driver you will have the fob so do not need the pad on that side.