Issues due to missing executables or kernel modules for your system. I do not know your setup and cannot help you figure out what you need. An exception for kernel modules is given if your goal is to generalize the script for any Linux distribution.
Suggestions for new features. This script is feature-complete in my opinion and anything else would just be bloat. As this is MIT-0 licensed, you are free to release your own version of the script and do not even need to give me credit. I will accept suggestions on making it more generalized for any Linux distribution, however.