If for some reason the Phillies really wanted Dickerson I'm sure they could make him an offer and also trade Bruce. Just doesn't seem terribly likely, or a good use of payroll given what Bruce actually costs.
Still think Bruce could become an issue though. Supposedly Klentak asked him if he was okay being a bench player for the rest of his contract when they got him, but then he became a starter and now it sounds like he'd still prefer that. Being the LH platoon partner of another thirtysomething player coming back from an ACL tear is probably not a bad situation though.
It will be interesting to see if Harper, Quinn, Haseley, Cutch, Bruce actually is our OF next year. I look at that and still think you kind of need a guy who can play CF in case Quinn gets hurt (hey, it could happen) or Haseley hits a wall. Of course they have to resolve Herrera too.