I threw this together a couple of weeks ago for a project where I had to repeat these various effects over and over and over. So I just slapped together this very basic FCP X effect template to save me time. Although it is very basic, it does gives you some unique Motion 3D space effects, a reflective floor, and a drop shadow in one. Check the ReadMe file for some important tips for installing, and about using it. Click here to download.
Notes: It was made to use reflectivity and drop shadow independently of each other. Reflectivity for stand along clips, drop shadow for a variety of picture-in-picture effects. Then all the position and rotation parameters of a Motion 3D space layer, with reflectivity turned off, for compositing and/or animating. When compositing you'd probably use the drop shadow and position/rotation parameters together.
If anyone has any enhancement requests, please let me know. No promises, but I'll see what I can do, if I have time. If you modify it yourself, let me know, share it with us.