Sliders do clutter the interface, I use the max plugin, but when I do have to pop into standalone I instantly dislike the layout. BUT - not to sound a dick (I dont use standalone much) isn't there a transform tool in the viewport with x,y,z handles like in most 3D apps? If not, I can see why pixelrush would want the sliders back.
However, a viewport transform gizmo is the obvious, intuative solution to transforming objects, not boxes, or sliders... if it already has this, I apologise.