This is a hoot!
Should you write more? Well, kinda. Personally the story isn't becoming the Light Lord, but rather a series of one-shots that covers what Harry learned by discovering and reading Salazar's books.
I can hear it now. "Honestly Harry, it has to be perfect. You really need to practice." Harry wondered once again how the girls in the DA learned of his discovery. He had a headache, but not that kind. It's been loved to the point of abuse and he just HAD to get out of there...
Or perhaps... after Harry asks about why Susan was clenching her legs together so tightly, Ginny whispers into her ear, "Remember you said 'oh, that's going to leave a mark'? Well, you did just that Harry, and she loves you for it!"