In picking up Senzatilla and Romero, the Brewers effectively took what was already a strength of their team, and made it perhaps bulletproof. Granted its been a small sample, but those two moves are looking very good.
I still have hope for May to figure his crap out and provide meaningful, effective starts this month and into the postseason. His stuff and makeup is better than what we've seen the last couple outings, and having a veteran steading presence in the playoff rotation would be a very good development.
The Cubs, on the other hand, only picked up Zeferjahn (who has been bad) to try to solve their biggest weakness, which was their pen.