Getting in and out of the rear table has been a problem for us, there is barely enough room to move around it. You literally have to suck your guts in to squeeze through around the table. Moving the tabletop base further off-center is not an option for me as it will put too much strain on the tabletop, not to mention the modification needed for its storage. The tabletop also doubles a bed platform and cannot be modified or shortened.
My solution is to modify the table leg and adding a swiveling arm. The swivel arm will add 6-inches off-set of the tabletop from the center pole and allows the table to easily swivel out of the way if needed. It only needs few materials which are readily available at your local home improvement store but it does involve some metal welding/fabricating.