Is there a shortcut for renaming layers in Illustrator CC? There isn't one listed on Adobe's Default Keyboard Shortcuts
If you hit alt+command+L you will get a new layer below the one you have selected, the advantage is that it displays the layer properties dialog box without having to click on the actual layer.
If you do Command+L then you only get a new layer, no dialog box whatsoever.
I mean, is not the ideal, but it has worked for me.
I have made a free to use script to rename Objects/layers in Illustrator. I have made an action and call this script in that, after that I am assigning a shortcut key to that action. You can see the full documentation, it will be really helpful. Here's the Google Drive Link
I came across this problem when I was working on a character in Illustrator to be used in an animation. To my surprise, I found that there is no keyboard shortcut in Illustrator to rename layers/objects. With so many groups and layers, renaming things by going in layers panel was very frustrating.