Vale would be a good choice.
Like I said, I quite like Vale and what she brings to the dynamic. Vale must be spared!
That could work, but he's a main series character, so I'm assuming it's unlikely, and really he'd need to go out in the Ultimate Tuvok Novel if he went at all. Tuvok is granted a stay of execution unless someone can
really justify it and do him justice.
Noooo! Ree is awesome, and disappointingly underused of late.
Orion's Hounds,
Destiny and
Over A Torrent Sea used him wonderfully, but he's slipped from prominence since. Ree must be spared, and he must take us to Pahkwa and show us the wonders therein.
He's been on an interesting journey, but it's stalled somewhat. He could be an interesting kill, so long as it doesn't come across as "clearing the decks". I'd like to see more of his Guardian training come into play.
Noooooooooooo! Chaka is one of my favourites. She's the matronly, kind-hearted spider-beetle aunt we never had. Her people need to be explored in greater depth too. Chaka must be spared.