Well, where should I start Lee?
Let's start with the rotation. It always begins and ends with starting pitching right?
Duke
Santos
Snell
Maholm
Perez
Not good! Not because they lack talent, but because they're so young collectively. Not a single veteran in the rotation to help mentor these kids. Yeah, they have the pitching coach to lean on, but usually players want to listen and learn from other players who are fighting the same daily battles. There is no doubt in my mind that these kids can pitch at the major league level, but there will be a lot of losses along the way! Actually, I'm not sure that Perez will ever fulfill his promise. He has had enough time now at the major league level to prove his worth. Great stuff, but something is just missing with him.
I like the closer, Gonzalez, but he is as worthless as a milk bucket under a bull in that role. How often do the Pirates get to him with a lead? Maybe he should be in the rotation. Take advantage of one of your most talented players.
There are other problems, but I will address those another day.