Your bats are pretty solid - I like alot of those players even though they are not top tier. Good values in BMac, Tutl, Placi even though he's had a real slow start he's money for avg. Arod goes without saying. Dunn Will hurt your avg. I have Aktins and am luke warm on him.
Pitching is good - I would not have dropped Billingsley so fast. Francis Marcum Petitte and Hoffman are all 50/50. Look for good FA pitchers to supplement. Try and make a move a week.
I agree, you should lay off the trades and let your team settle in. Tulo is not gonna be playing like this all year and once he starts rocking your offense will look great. I only have a problem with Polanco as a starter, you should be able to get a better option there. Like someone said earlier your pitching has a lot of hit or miss guys this year like Lowe, Pettite and Marcum. I think you can deal Dunn if you want to. He hurts your average and you have Markakis in Util to move to OF. People are going to look for Dunn for HR's and things like that. I would try and swing Dunn for a pitcher that you can rely on most of the time. Your closers are very nice.