What you are describing should happen by default. Even motion blur on deforming objects with changing topology should be rendered, but just transformational one, meaning motion blur from movement, rotation, scale, or camera movement.
Actually, Corona can render motion blur on deforming objects just fine, as long as topology doesn't change during transformation, which happens on liquid simulations for example. But as long as you use simple deformation, like for example noise or bend modifier, motion blur of the actual topology will render just fine ;)
Oh, and of course, you do not need to disable multithreaded parsing or anything like that for it to work. You should do that only if you get parsing crashes and you specifically use skin or skin wrap modifier.