My players would love to see a Companion Expanded line...they love some of the options that have shown up in the Races books, but there just isn't enough "love" for them to run with it. For example in the Elves book you have a section on "magical" food items that can be created with cooking and alchemy, but with nothing else coming along those lines they are not keen on expanding their character that way since there is limited number of items listed.
I understand that I or they can create additional items, it just seems my group dynamice doesn't give us the time to do those things.
Just a thought.