That is because a player like Bourn is good for a team that is 1 player away. Think about like the trade the Braves just made. Now they are an elite team.
The Mets are 4th place with or without Bourn. In fact, fixing the poison pen would help the Mets more than spending 15M per year for Bourn. So if the Mets take 15M and sign 2 relievers who could potentially close if needed and a Hairston type OF, the Mets would be better off.
Now, it is not that I wouldn't want Bourn but not if it cost the Mets the 11 draft pick. Now when you are building the farm and a better future.
Here is a list of CF who can potentially be FA after this season:
Alfredo Amezaga (36)
Rick Ankiel (34)
Coco Crisp (34) - $7.5MM club option with a $1MM buyout
Rajai Davis (33)
Jacoby Ellsbury (30)
Carlos Gomez (28)
Curtis Granderson (33)
Franklin Gutierrez (31) - $7.5MM club option with a $500K buyout
Tony Gwynn Jr. (31)
Nyjer Morgan (33)
Andres Torres (36)
Chris Young (30) - $11MM club option with a $1.5MM buyout
So if we don't get Bourn this year, there are plenty of CF next year.
Right fielders
Carlos Beltran (37)
Endy Chavez (36)
Shin-Soo Choo (31)
Nelson Cruz (33)
David DeJesus (34) - $6.5MM club option with a $1.5MM buyout
Chris Denorfia (33)
Mark DeRosa (39)
Matt Diaz (36)
Jeff Francoeur (30)
Corey Hart (32)
Xavier Nady (35)
Nyjer Morgan (33)
Hunter Pence (31)
Ichiro Suzuki (40)
Left fielders
Jason Bay (35)
Endy Chavez (36)
Mark DeRosa (39)
Matt Diaz (36)
Ben Francisco (32)
Raul Ibanez (42)
Reed Johnson (37) - $1.6MM club option with a $150K buyout
Austin Kearns (34)
Jason Kubel (32) - $7.5MM club option with a $1MM buyout
Nate McLouth (32)
Mike Morse (32)
David Murphy (32)
Xavier Nady (35)
Laynce Nix (33)
Martin Prado (30)
Ryan Raburn (33)
Delmon Young (28)