I'm not so sure that Braun is going to miss any games this year over the PED thing, barring the existence of an actual positive test result, which doesn't seem to be the case. The players' union is a powerful one, and they are almost certainly going to fight any suspensions that come from someone merely saying that this guy and that guy took PEDs. Such a fight would probably not end in the next four months.
Ellsbury, on the other hand, could miss some time in the upcoming months, due to Performance Hindering Injuries. He seems to be holding up okay tonight, though, so maybe he'll pull through.
I guess it comes down to what the FA pool looks like, pitching-wise, in your league, since you'll need to replace Harvey from there (or another trade, of course, if you think you can spare even more batting to get a pitcher.)
If you have a moment, please check out my probably easy-to-answer trade question... viewtopic.php?t=461960