Ground Clearance??

Ground clearance also depends on how low to the ground your hitch is.  I've seen some really low hitches on some vans and SUVs where the tong jack scrapped the ground over every bump.  I haven't seen a problem with my Trailblazer.  Honestly, my gravel driveway isn't at all level and has some nice dips and bumps in it and I've never scraped either the tong jack or the stabilizers.  Some of you guys must be really low to the ground.  My honest, but newbie advice would be to drive around with it for a while and see if the risers become necessary.  This is not to say you shouldn't get the riser, for multiple other reasons, but I don't see it in my foreseeable future.  I'm sure that I may scrape the tongue jack or stabilizers at some point while roughing it in some campgrounds, but as long as it's grass and dirt, I'm not too worried about it.     

I have the same jack as ToddsPod (same jack stands too).  I've removed the factory jack, especially before I got risers and a weight distribution hitch that thing hit the ground every time I sneezed.  A real pucker factor when you are doing 60!

Is that a regular 2 wheel dolly like you would move a fridge with?

I'm sure if you talked to a design person about the aesthetics of the lovely R-Pod there would be a rational explanation for the lower deckbheight. It would probably involve the appearance bas on the width to height ratio, the weight to track width, the wheel and tire size (why put 17"wheels on a 2000 lb trailer?),not to mention the lovely curvature of the exterior and all the stuff set on the roof.
I agree with everyone here. Those risers make a great difference in drivability and, to my eye, into appearance as it sits on the ground, as well as using the entry stairs.
Enjoy your new Pod!