Here's the thing, while I can see how adding memorized spells to a printout might offer greater usability, our goal here is to match the official statblocks for 5e.
Do you have any examples in official books you can point us to of characters with memorized spells in their statblocks? If so, they'd represent an official guideline as to what a statblock should include and how to format it and then we'd know how to display this information.
Let us know!