Question is how much can you tolerate. Most lightweight TTs, even if you put jacks under the frame and lifted them off the suspension, will still have somewhat bouncy floors when you walk around. That's part of the lightweight compromise, and the Roo is about as lightweight as RV construction can get.
Cranking harder on the corner jacks, which are mounted under the floor rather than under the frame, will not help that much and can possibly warp the house structure. Immobilizing the wheels can help some, but you can still get tire and suspension bounce so long as part of the weight is supported by the suspension.
I find the same issue in stick and brick houses. The lightweight trussed floors used since the 1980s are a whole lot less stable than 1920s joist construction, and neither is as solid as walking on a concrete slab.