Honestly more than the Basic Panel for Develop is not an essential for mobile, which is already available... Releasing more Library Module Tools will really make Lightroom Mobile a great Companion App...
I hope these features are on the horizon?
I would also love to see my user presets to choose and it will make it very easy to edit the shoots.
Custom sort order, rating, smart collections and keyword tagging ist THE job, you can do on the iPad. PLEASE add these features in a future update.
The iPad can also be useful to demonstrate customers slideshows. I would never calibrate sharpness, color temp, de-noising on the iPad.
Furthermore MOST WANTED in the Lightroom 6: face recognition!!!
Is this planned?
Geotagging would be nice too, though that's a lower priority for me.
1) Review photos and dismiss ones I do not want to keep. Minimal editing needed to do this , crop, light adj., sharpen, straighten.
2) Rename files.
3) Add keywords and geo-tag.
4) Occasionally share with others.
Then when I get back home I can review and improve editing on larger iMac as all the photo management has been done.
As others have said, LR Mobile is a great tool for the first pass (flagging/rejecting) and for cleaning up images, but it also needs to be usable as a tool to help us sort through photos, order them, select which are used for what purpose, and all the other things we do with batches of photos while we are away from a desktop
To institute Color Labels that are compatible with Desktop Lightroom, you would need to have a two-tiered set of entries. First, you would have to activate the Label field text as a Lightroom for Mobile editable field. Second you would have to add the ability of defining a color label set against the text label fields. It is a level of complexity above the current star and pick flag system.
If for some reason your color label set on Desktop and Mobile have a mismatch (or are deliberately different) you would not see the colors you expect. Many people, me included, use multiple label sets. Which would sync with Lightroom for Mobile and how would you see not breaking the multi-color-label workflow when syncing color labels?
I keyword all photos by manufacturer, model, year, etc.
The only way I have found to produce a slideshow that displays all of a particular model of a car by year is to maintain the Title Field with the year of manufacture and manually sort the slideshow by displaying the title in the Grid View and sliding the photos around, (which "crashes" every 40 or so shifts meaning restarting the database).
So when I choose something like Ford Mustang which produces 300+ Mustangs to shuffle, it takes quite some time to reorganise. I save the slide show, so when I go to the next car show and add another 20 or so Mustangs, I then at least have a head start to manually shuffling them back into the slideshow in the correct places.
It would be really great to have a single numerical field in the database - in my case always the title field - that I could tell the filters to sort by, which would save me hours of work