The following items are outstanding. Some are feasible, some are likely not.
In no particular order:
Better inline documentation for evaluating choices and what sections apply to which functionality.
Replace the eleven menu options with a volume control slider for better control and granularity. This is not high on my priority list as the hardware buttons work fine on my laptop
The install script installs the dot files into your home dir. If you're like me, your laptop is a single-user system and there's no need for individual personalisations.
Provide a second script to install to system locations.
This will make it easier to automate with admin tools like Puppet or Ansible and also declutter your home dir.
Not much there now.