No, it’s bad really. The fact that someone on rollerblades can easily circle around those does not make it excellent because rollerbladers can use certain parts of it in such manner. Even for bicycles, it’s very taxing, very speed reducing, and quite unlike normal bicycle driving to drive such slalom, so it cannot be good.
Maybe we have to make a choice here, and decide that for smoothness below
intermediate, the car is the primary “measuring vehicle” and if the smoothness is notably different for 2-wheeled vehicles, we should develop a new tag for it (bike:smoothness=*for instance, wherebike=bicycle,motorcycle, etc.?)?
No, that would be bad idea (as explained in that other thread). For each different smoothness, different vehicle is best measure - for some it is rollerblades, for some road or tracking bicycle, and for some sports car or SUV, etc.