How utterly charming! I loved the dynamics between Severus and Minerva - after teaching together for twenty years they had a solid working relationship, and using Quidditch to mend the gap left from Albus? *loves*
Your Ron was bang on, too. One of the things that annoyed me in the Epilogue was the fact that Ron was still immature even after 19 years! You portrayed him well. Loved the dynamics with Harry and Hermione, too.
Now the inner Snarry fan in me is going to pretend that Harry and Severus get too close working on a mission together *grin*