I also used to compose music a while ago.
At some points I had thought about trying to do commentating. I consider myself fairly adept in the ability to analyze metagame and player psychology but I am not so good at build orders and I haven't really paid much attention to actual players and tournaments for a long time past specific matches.
Here's an example of my commentation I did for a Final Fantasy: Mystic Quest playthrough I haven't finished yet (That game is surprisingly gay once you get into it, petrify EVERYWHERE.)