Hi. I'm not very active here, but this thread intrigued me, so i wanted to chime in. Almost all of the proposed new Shard names in my opinion lack snappyness, they have some logic behind the naming, but its just doesn't roll of the tongue like the names of the know Shards. That might be just my biased opinion. So i like to propose my on Shard names, that at least to me, sound just right and explain the logic behind them.
This is the grouping i use (explanation will follow below):
Devotion-Dominion-Odium-Ambition
Ruin-Honor-Emergence-???
Cultivation-Endowment-Preservation-Immersion
Autonomy-Isolation-Subjugation-???
So the first group all have been killed by Odium, my logic is that he went after those most similar to him first. Also this resonates with the allomantic metals, Devotion and Dominion with external focus (you can dominate or devote yourself to someone) and Odium (passion) and Ambition with internal focus (you can be passionate/ambitions about something).
Second group is fundamental forces. Ruin and Honor fall perfectly in this category. Ruin the force of entropy. Honor is anthropomorphised fundamental forces. Preservation in my logic does not fall in this group, since there is no universal force of unchange (stasis). While Ruin and Preservation are opposing shards they are not exactly opposite. So i proposed a Shard named Emergence. Emergence is not exactly a force, but natures way of getting more and more complicated over time, dumb little parts becoming something greater over long periods. I think there is a WoB, where Brandon mentions that not all Shards have opposites, but there can be more then 2 opposing Shards. (im bad at foruming, cant find the WoB).
Third group. Just makes sense to me. They also could be assigned internal and external focus.
Fourth group. The Shard that wants to run and hide, i actually thought it was canonized to be Isolation, but since nobody mentioned it here i guess i dreamed that up myself. Shard of Subjugation sounds awesome, although it might overlap with Dominion a bit. Subjugation would be opposite to Autonomy, both would have external focus, while Isolation and Unnamed Shard would have internal focus.
I could write more to explain my logic, but first would like to hear some critique. I might be pulling this from my posterior.