Maybe make it easier to discover features. I didn't realize you could pass options to brew install. If you do 'brew options package_name' you can see the options you can pass. For example, poppler can be compiled with glib support by running 'brew install poppler --with-glib'.
I'm just surprised I can't 'brew install cakebrew'.
My use of brew is rudimentary, but I only ever use four brew commands:
brew install brew update brew upgrade brew uninstall
If this helps make brew more popular, then I think it is a great addition. It seems I am not the target audience, but hopefully one exists!