I disagree that trying to get Pablo back into the everyday lineup was patently ridiculous. As I said, I was okay with the trade when it happened. Of course, it looks terrible in hindsight, making it difficult to defend, but I had no problem with dealing Shaw.
The fault, IMO, lies with not having a viable back up plan should Pablo fail. In fairness, if I recall correctly, Marco was part of the plan but was out most of the season with injury.