Most 3D capable planes won't fly a pattern manuver as well as planes designed for the smoother techniques. Much larger control surfaces need to move very little for the plane to move in a direction other than that given in a control input. Control linkages without any slop and better quality servos that center better will help. If the plane is not balanced laterally this will cause other problems. It can be trimmed for one flignt speed however when the throttle is changed the trim also needs to be changed. The "floating" observation is the 3D mission just as a sportscar and family minivan serve different purposes.

EXCAP232