This was my main gripe, but also:
* Image stabilization (Hypersmooth Pro/ReelSteady) as a subscription feature.
* Auto-rotate and orientation lock don't work in streaming mode. (I reported this as a bug on the Hero7, was told it was being looked at, still a problem on the Hero10 when I stopped paying attention)
For what it's worth, DJI does offer desktop software for their Osmo action cams. They also have a direct NAS/cloud storage upload option from the camera, as well as allowing normal transfer over USB or by pulling the SD card.
This is my biggest issue as well. It's actually the one "real" thing I use the iPad for. It still gets the mobile app interface whilst being on a bigger screen and being almost usable.