In providing my 2 cents, I'll first preface that I'm a Vontae Davis fan who was happy when they drafted him #25 overall in the 2009 draft (didn't know Clay Matthews would turn out to be so good). Anyway, the 2nd round pick the Dolphins just acquired for him could likely be a top 40 pick. Only losing up to 15 spots in the draft for a guy who isn't fitting into your program and has been demoted to the third corner 3 1/2 years later isn't the worst thing in the world. I'm not happy about losing Vontae, but they did get decent return on a guy that didn't fit into their plans. While we all would have liked a first rounder, that wasn't ever gonna happen.
Lastly, many seemed shocked about what's happening with guys like Marshall and Davis being shipped out, however, those same people aren't considering that this is often what happens when an entire new staff takes over. They want their own guys. Unless you've got a bonefide star that fits in to what the new staff wants to do, most the vets are gonna end up going at some point. I wouldn't be surprised if Reggie Bush, Jake Long and Karlos Dansby are moved before next season as well. Heck, even Cam Wake isn't totally safe. If he has a monster year and someone offers a high enough pick, they'd probably move him too (which I'd hate) because of his age and the fact they are stockpiling picks in which to select their own guys.
While Jeff Ireland was involved with acquiring some or all of the players he's now moving, it was with another staff's ideals in mind. Plus, he had Bill Parcells making final say on many things so, as far as we know, he wasn't totally on board with some of the acquisitions anyway. Regardless, he is now on a brand new page with the new staff and more of these types of moves are still to come.
Think about it. They know they couldn't get everything done in one offseason. They believe they have got their QB of the future and are now gonna sell off whatever they can to build their own team around him. The smart thing is, they aren't going to proactively sell off these guys but rather let the teams desperate to fill a hole contact them thus maximizing their leverage to get the highest return possible. That's what I believe the plan is anyway.