I had to quickly create an video advert on a tight timescale and dove into it with PD365 but I found that having to use the mouse to grab a pointer to move about from place to place slowed me down considerably. On FCP all you have to do is hit a couple of keys to get around the timeline but the biggest thing I cursed myself for was not being able to centralise the library.
I worked 12 hours straight to get the advert out and had clips, images, sound parts and text everywhere. (Yes, I should have been more methodical... but, the worst is yet to come.
I finished the advert... produced the master and started tidying up my computer and not thinking a deleted files which where in the downloads folder in the documents and in the store....
Then I got a call that the client wanted a tiny change.... so i opened up the project again and many files were missing. That added another couple of hours of editing for me.
Botton line, yes, I should have been more organised but that is not necessary in FCP or iMovie.... all your files are brought into a library.
With these things in mind I will move away from PD365 and hope that someday they will fix the issues and I can come back.