Very nice fleet indeed! I guess that depends. What is your main demand? What clients want in regards to end results, or specifics about equipment, etc.
For instance, I sold my I1 a while ago because 1) it was too **** big and cumbersome; 2) I was able to do 90% or more of the takes with my P3Ps and P4s; 3) the demand for high-end, 4K/super fast/pro-level video&photo is still rather limited when compared to the demand for lower-res capturing - even for TV and advertising production; 4) I could hire Inspires and hexas with better cameras, or even subcontract for those special jobs and still satisfy the client and make a profit without the investment; and 5) I found out that most of my clients were after my pilot and photography skills rather than the size or rotor number of my aircrafts in my fleet.
I do maping/surveying/3D specialized in social media productions which doesn't require uber-equipment but rather nice, daring, original and good-looking shots which I can perfectly do with my current DJI quads (a P3P, a
P4 and a Mavic for the incredible portability with is an undeniable plus in whatever situation). So yes, it depends on a few things IMHO.
I'm considering a
P4P but at the same time thinking about waiting for P5 if it does't take too long. My view is, can't go wrong with any of these current DJI quads, and if money is no problem then why not hav'em all... But then again, in the end it's just a tool.