Let me adress the rest of your post, because quite frankly, most of the opinions are ridiculous:
Hall- We're paying basically nothing for him.
Scutaro- He was the best SS available, and he's only a stopgap until Iglesias is ready, who, if you don't now, is a player the Sox invested 8 million in expecting him to be the SS of the future, therefore they were not going to deal talent for another SS (because there weren't any younger, long-term options in the FA market as you suggested, but i digress) when they have a player that they expect to take over the position.
Cameron- You don't like him, we know, but that has nothing to do with whether the signing made sense or not, and it did, and you would know if you took some "time" to find out.
Beckett- You're bitching about him getting extended? Seriously?
Bullpen- The one point where you're seemingly correct. Another lefty arm was needed, and the Bonser experiment imploded.