Zoom in / out problem in high-tilt situation

Hi,

When the pitch angle of Camera is near 0 (high-tilt situation) and the cursor is in the corner of the Cesium window, the moving distance would be very large and lose the location very easily if I active the zoom in / out function. Compared to this, I think the effect of ArcGIS 3D earth is better than Cesium. (reference website: http://www.arcgis.com/home/webscene/viewer.html?webscene=3e17e7850ccf44c688970300fa3fa5f0 )

Does it have any method to improve this function? Thanks a lot~