My idea for "best workflow" would be to eliminate the overwhelming number of complicated steps you are considering.
Work with one or the other as per your project needs.
I agree KISS is the best approach but I just feel like Adobe has met most of my editing needs, just not all that I mentioned above. The biggest problem I see is even if I do all my edits in PPro, once I go to FCP for grading in Color 1.5, I am certain to lose all of my metadata since Color renders new files into a new sequence. I can always Smoothcam my clips before I bring them into PPro if need be. I just wish PPro used the same layout for their CC like FCP.
Thanks for the input my friend.
A lot of FCP workflows use intermediates where as PPRO works natively with most professional file types (including RED)
I never liked the way FCP used Motion and Color as separate apps.
Maybe you should take a look at some of the CC plugins for PPRO.
Smoothcam removes camera shake.
I guess my best solution would be to remove FCP from my workflow altogether and maybe that way, I force myself to get more used to PPro's CC tools. Lettng go of Color's grading will be really hard though because Color 1.5 can do some really amazing things.
I'm with Craig on this one--too many layers of abstraction to devise a sane workflow. It's certainly not uncommon to start on one platform and finish on another--I'm beginning a massive endeavor involving capture in FCP, processing in PPro CS5 for Mac, and finishing in PPro CS5 for Windows--but trying to ping-pong is just a recipe for disappointment.
I think you could certainly find suitable plugins that would more or less replicate the FCP workflow you're accustomed to. For CC, check out Red Giant Magic Bullet Colorista, or perhaps Synthetic Aperature Color Finesse (3.0 is available in AE CS5 now, should be available separately soon). There are motion stabilization plugins too, like Magic Bullet Steady, and I suppose eventually ProDad Mercalli will be available.
I guess that the point is, if the metadata is important to you (which it sounds like it is), you'll want to stick with one platform. While media files may be interchangeable, data about them isn't--seem a little silly, no?