I do hope they trade Perkins for the reasons you mentioned but they won't. It would be hard to get back equal value.
I don't believe they will trade Perkins either but for others to say they shouldn't is pretty funny. Look at what happened with Buxton and Sano this year, Gibson two years ago and understand we are a bad team. The idea that Rosario, Buxton, Sano, Meyer and Mays are all going to come up next year and produce is delusion. Players get injured, they struggle and other things come up. If you have an older asset like Perkins, you trade him if you can get a legitimate deal for him. You keep adding pieces and deal with specific issues when you get there. Trade Kurt Suzuki. Players get hurt, they get into funks, and sometimes it all falls apart in a hurry. Get rid of them and move forward rather than clinging to the ridiculous idea that the stars will align in 2015.
If we get close to competing in 2016 then we can add a closer if one has not emerged. Then we can add a catcher if it is still a hole on the roster.