What player you get in return is the key answer to the question.
A) There is a serious hole at DT. Cole's contract is up at the end of the season. Pickett and Jolly have their contracts expiring next year. It is desperate.
B) Clifton and Tauscher are not once they once were and declining.
C) Grant is inefective.
The decline in Harris to Williams could be offset by an upgrade at another position. Listening to offers does not necessarily mean he is gone.
You have to see what the trade is until deciding.