They way I look at it is that in a couple months I don't expect the bullpen to be an issue but SS/3B probably will even if Pratt or Williams get a call up I don't see them being world burners right away.
I think our 1B depth is great, Vaughn is back today, we have Bauers and Black looking like capable everyday players and still Adams, Burke, and probably Wilken as upper minors options later in the year. I don't think we would get a ton but if we traded Bauers (again like a month or two down the line) I don't think we lose anything having Black take his place.
Trading guys for max value is the Brewers way, I bring up the idea of possibly trading Megill becuase we have seen desperate teams way overpay for power arms with closing potential mid-season almost every year. We have also seen our organization find/make guys who can rise to the occasion in late innings. We have Uribe, Ashby as proven late innings guys with Hall and Anderson as solid mid inning guys. There are plenty of guys like Fitzpatrick, Koenig, Yoho, Drohan, Gasser, (I think on of Gasser/Drohan could be move to the bullpen, especially if Hall earns a late inning spot) Childers, Holub, Rob Z, and others who could have some late innings potential that it would make trading Megill plausible. I wouldn't trade him any time soon but this is the Brewers way explore trades and see if anyone give surplus value.