The only thing I find missing is that, with the keyboard on a multiple select box, I can't remove my 1st choice without having to remove my 2nd choice too. (So, for instance if I choose Polar Bear and also choose Brown Bear, I try to move my cursor between them in order to Backspace over Polar Bear but I can't. I have to Backspace over Brown Bear + Polar Bear in order to delete Polar Bear.) It would be nice if, when I used my direction keys, it would highlight the selected items individually and then let me hit Delete or Backspace on my keyboard to delete just that one.
There appears to be several pull requests related to keyboard controls. I haven't looked into any of them in depth but one of them may solve the issues you are talking about.
The only thing I find missing is that, with the keyboard on a multiple select box, I can't remove my 1st choice without having to remove my 2nd choice too. (So, for instance if I choose Polar Bear and also choose Brown Bear, I try to move my cursor between them in order to Backspace over Polar Bear but I can't. I have to Backspace over Brown Bear + Polar Bear in order to delete Polar Bear.) It would be nice if, when I used my direction keys, it would highlight the selected items individually and then let me hit Delete or Backspace on my keyboard to delete just that one.