It would be mighty useful to include an 'Administrative comment' tab per view mode manage display setting.
An example of where this would be useful is when using a modular system of view modes across multiple content types.
Would this be useful to others?
UPDATE:
Perhaps an improvement to an administrative comment tab (On a view mode) would be an autogenerated list of where the view mode is used in the frontend / backend. On a DS heavy site I can see the advantage of a linked reference list.
I've mocked up an example: 
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| Comment | File | Size | Author |
|---|---|---|---|
| #7 | usage-for-DS.png | 68.68 KB | racinggrinner |
Comments
Comment #2
chroid commentedI'd find this a useful addition to the display layout!
Comment #3
danielveza+1 for this. Would be a great idea
Comment #4
racinggrinner commentedPerhaps an improvement to an administrative comment tab (On a view mode) would be an autogenerated list of where the view mode is used in the frontend / backend. On a DS heavy site I can see the advantage of a linked reference list.
Comment #5
racinggrinner commentedComment #6
racinggrinner commentedComment #7
racinggrinner commentedComment #8
racinggrinner commentedComment #9
racinggrinner commentedComment #10
swentel commentedThat's an interesting feature. I wonder whether this should be a core thing - although I can imagine it might take a while before this would get in though. I'll have a quick experiment next week to see how fast I can figure out where a view mode is used.
Comment #11
racinggrinner commentedThanks @swentel for taking the time to experiment. Curious to see where it takes you.
Comment #12
swentel commentedThis is really had to get right, this should rather live in core somewhere, or even a different module since it's not necessarily related to DS anyway.