I like this very much. It reminds me of characters in other fandoms I love. I enjoy those pairings, but I think we need more gen Ben fics. :) UST could work here, too.
How much time do you think has passed between his heroic stand and his dark return? Weeks, months, or years?
And any ideas on Ben-now-Kylo's relationship with Hux? (Poe could easily be a BFF, but idk how Hux would react to him. It prob depends on how Ben becomes Kylo.)