This is sort of what I was thinking after looking at the initial instability, it seems like the steering response that normally keeps you upright while carving is hampered by using skate tech vs a classic castor found in thems caster-boards-speedboards-bikeboards
some possible advantage to using a busing suspended mtb truck is making it closer to a 4-wheel esk8 so you can stand on it while stopped without putting a foot down.