I think your oldest son is being a bit unfair to Escobar and Plouffe. Plouffe hasn't been a star, but he's been a top 10 3B this season, so solidy above average. Escobar has been above average both defensively and offensively. Santana looks like he could be better in boht categories (though playing CF isn't helping him), but I'd caution on using the term 'utility' to describe Escobar. He gets that term b/c he plays several positions, but he's played them very well.
This team's problem is mostly pitching related, and unless Nolasco gets better, Hughes keeps doing what he's doing, and we see improvement from May and Gibson, the problem will continue to be pitching.