45.6 inches of rain recorded at the far end of our street. Numerous houses on the bayou side of the street took on water, probably 1-3 feet in depth. Miraculously, the opposite side of the street - where we live - wasn't flooded.
A little surprised that iMovie won't accept mp4, but there are conversion programs available. I've used one called Any Video Converter (Free) with some success. I've also used Video Shrinker to downsize. For transfers, I use Dropbox to get around the limit on e-mail servers.
Horses for courses. Two of your "sway factors" go the other way for me: I'm seriously considering the X70 because of the tilt screen and touch focus capability. I used the HiBW mode with the GRD III and IV and never warmed to it; would rather use the capabilities of Silver Efex Pro to do...
The LX7 image stabilization works very well for me. Not sure I have a M43 lens that stabilizes as well. The ND filter is a big factor, as is the size: my LX7 rides in a dry bag in the cockpit of my kayak. Size matters! :-)
I'm looking at the 24-85 as a replacement for my LX7, which I now use mostly for video. Built-in ND filter and 4K UHD very appealing. I believe I read that there's going to be an optional EVF...? I do use the Panny LVF2 with the LX7 and it's really helpful in sunny conditions.