Adobe has built Photoshop to be the top digital imaging application for the desktop. A part of the reason is the ability for users to supplement third party applications such as Nik, On, and Topaz for narrowly defined imaging technology. Adobe is rapidly building an imaging workflow structure for photographers with Lightroom and Lightroom Mobile that has the potential to achieve Photoshop like preeminence. The two major drivers for that are the recent addition of a RAW workflow and the release of the iPad Pro with an Apple Pencil. Today however LRM users are frequently requesting adding features such as the Healing/cloning brush, adjustment brush, selection, keywording, metadata (ITPC), watermarking, layers, brushes, video, text, frames, and presets of various kinds. The current LRM solution to some of these is to edit in other free adobe apps such as Photoshop Fix and Mix. This is not the best solution but it works (beautifully). I understand the difficulty responding to all the requests with both IOS and Android, with thousands of devices, and the need to set priorities, release dates, and bug fixes. One way to meet user frustration is to give them some relief by extending the PS Fix/Mix solution and allow Importing/exporting LRM images in third party apps such as Snapseed, Pixelmator, Photo Mechanic, slideshark, etc. It provides the user relief while waiting for implementation of needed tools into LRM. Once the needed tool is implemented in LRM there is no longer any desire to have to jump out of LRM to use the needed tool. With the improvement of LRM input/output from third parties. Professional photographers will rush to the LRM workflow solution. Keep up the good work.
LR Mobile is designed to sync up the Original Resolution the Cloud (where they will remain) and then back to LR Desktop (if you are signed in on both).
*Desktop to the Cloud only syncs Smart Previews*
The files will automatically sync back to LR Desktop (where any edits done will sync back to the Cloud and your Mobile device).
Collections you have made will be in the 'From LR Mobile' Collection Set and within 'Folders' you should see your Mobile Device. The actual originals sync back to /Users/XXXXXXX/Pictures/Lightroom/Mobile Downloads.lrdata (but you can choose the location in LR Desktop prefs).
It can work quite well for those that have internet connection. It may not for those that are shooting away from one. Direct Wired Sync has been requested but LAN sync is what they are 'looking into', to avoid the Cloud upload time.
You may be interested in this thread from one of the LR Mobile Forums: A RAW workflow on the iPad - my initial impressions
Hope this helps