Please add the selective color correction to photoshop on the ipad. It's really missing. I also miss some camera raw features and filters to really use photoshop ipad to edit my photos. I always need to use half lightroom, when I want to push the colors in a special direction. Normally I edit my photos completely on photoshop desktop.
The next problem is to add lights in photoshop on the ipad. There is no filter for clouds and motion blur to get sunbeams for instance. You also need to save each photo in the ipad photo app to import it in an existing photoshop file.
I also have problems to export psds to lightroom mobile. I never find those files in lightroom on the ipad. Please improve the cross-app workflow between those apps. Both programs are not interlocking like they do as desktop version. Maybe it's possible to get some updates and improve the worflow, so you can edit photos while travelling as well. That would be great.