I have a P3P as well. Wanted to go for the 333 but under the current rules, you are supposed to be at least a sport pilot or have someone on staff who is to operate the quad. I'm not and didn't want to go through that expense. From what I read, the rules are supposed to change, but no one knows when. The rumors are you will have to pass a test to show you know how to control the quad, but will not have to have a "real" pilot certification.
I talked to a small business at a boat show last summer, their primary income comes from video / stills shot by a P3P and an Inspire 1. They told me their local FAA rep said not to file for the 333 as the rules were being redone, but to continue their business as is until that is announced.
Personally, I am going to wait for the new ruling.
Sorry it doesn't directly answer your questions....but every bit of info might help.