Here is my new theory for Dawnshard categories
We know change is a Dawnshard, so I used that as a seed to try grouping some and came up with some other options
Change
Invention
Cultivation
Virtuosity
Ruin
Essentially you have creation, maturation, embellishment (art), and finally degradation. All relating to change
Protect
Preservation
Honor
Valor
Mercy*
Keeping things the same, adhering to oaths, brave defiance, and willingness to show kindness
Feel
Devotion
Odium
Whimsy
Mercy*
These shards seem to be more emotion based. I know others are too, but these seem to fit best. Love, hatred/passion, silliness, and kindness
Lead
Autonomy
Dominion
Endowment
Ambition
These shards exemplify different aspects of leadership (to some people at least). Self-governance, governance of others, gifting to others, and internal drive.
Obviously these are speculative and none are perfect fits, but I like how this works. I'd be interested to see what other combos everyone else has
*Mercy seemed to fit in either spot