Nate makes these decisions. He's busy fixing the last bugs so we can release Spine v3. Don't know when/if this will be a feature.
For now, on Windows, F2 is a shortcut for rename.
If you have to rename a bunch of bones. You can probably F2 > CTRL+V > a number > enter and save some time.
CTRL+up/down also travels up or down the hierarchy.
You can also setup a shortcut for New Bone and edit other hotkeys by going to Settings... and opening the hotkeys file there.