Instead of just saying, "It makes things more clear," explain how it makes things more clear.
Ensure terminology is consistent and correct throughout the document. (e.g., "Block statements" vs. "Control statements")
Big(ger) TODOs
Add a section explaining the perils of using eval and why it should be avoided.
Add a section explaining how to properly use set -e.
Add information regarding how to deal with logical operators (or redirect and i/o operators), similar to that of inside "Formatting Multi-lined Commands", to _____...
Add information to (some section) specifying that global variables should often be placed at the top of the script. This ensures that the script isn't reliant on variables defined within a function. (or something like that)