"problem"? Friendship is Optimal was excellent, and I miss Myou've.
If you need more rationalist MLP fanfiction in your life, I'm 5/6 of the way through writing mine and could use feedback. It's intentionally somewhat less rationalist and more fanfictiony than either of your examples.
(I'm aware of the irony of posting this link in this thread, but I figure most posters who are bored by all things pony will have stopped reading the thread by now.)
If it's worth saying, but not worth its own post, even in Discussion, it goes here.