I just began testing Adobe Rush as an option to manage media and create rough video cuts while traveling. Footage comes from a Sony FS-5 and an A7R-II in XAVC and XAVC-S wrappers. (The FS-5 footage comes in an MXF container).
I installed 1.5.12 on my iPad Pro and pulled the memory cards from the FS-5 and A7R-II to test imports. I move the files to a folder on the iPad, Lauch Adobe Rush, and go to the Add Media / Import from Files.
I am able to import the A7R-II footage, but all of the files from the FS-5 (my main camera) just show the message "Hiding X incompatible files". (see attached)
More information, though the challenge remains. I installed Rush on my iMac in the office and tried doing the import from there. From the Mac, importing footage from the FS-5 card directly (and syncing it to the cloud) worked fine, and once the cloud sync was complete, I was able to open and edit the footage on the iPad. It appears that this import issue is limited to the mobile/iOS version. Frustrating, as I thought the whole point of Rush was to be able to organize media and sketch out rough ideas from mobile.
Someone on an alternate forum was describing his process using the proxy file option from the FS-5 (it has dual card slots and can create an H.264/720p MP4 proxy whilst recording the XAVC main file). However, this requires a fair amount of file remapping once you move the project over to Premiere Pro.