I'm of the opinion that quite a few things need to be looked at with trades. Other teams seem to agree to trades without considering factors outside cash and potential. As long as that blue line is in your favour, the trade ALWAYS goes through. And its instantaneous. You could be in a tight race for the division title, yet still your division rivals will readily trade away their stalwarts to you.
I took the Athletics to the world series in two years from rebuilding and plunging my division rival's stocks. It was too easy. It isn't like this in the real world.