I would have to say that your starting pitching is a weakness on your team. You dont' have an ace or really any top tier pitcher to anchor your whip and ERA.
The thing I would watch for if I were you is the health of percival. If Percival is able to regain the Closer's role at some point in the beginning of the year that will give you 4 closers. In a 12 team league that will be more than enough and you should be able to deal one of them.