There's always going to be the engineering issue of the wheel wells, and front/back weight balance. The Oliver, with its double hull, can't really be set flat and high above, imo, like a lot of sunblock stickies. That creates a bit of a conundrum with a walk around queen, I guess,, unless it's located forward, like airstream does it, in that size range. (Which I dislike, but I understand the "why."
I'll be interested in seeing what Oliver comes up with,, if/when a larger trailer is designed.
In the meantime, these many threads should give them input on what potential buyers feel is important.
I'll probably still stick with my 2008. It's likely to be roadworthy for decades to come, long past my desire to travel and camp.