I think Yay, he can give us the deep speed we need, also got to remember reports are that Keyshawn wants a new contract, and their not going to give it to him.
Second, with TO stretching the field, if Keyshawn stays- he is the possession receiver, and Terry Glenn in the slot. That will spread out the defense, be able to run more, got to remember with Dan Campbell seemingly not coming back now, and he isnt the same player with the injury. You may have to go to more spread defense with 3 Wr's and one TE.
Only way to keep TO, he signs with incentive loaded contract, with details to no reporting to media, or fines or penalities, or he can be cut from the team. TO knows he has to get his image back, only way to do that is go to the Super Bowl with a really good team, and win it, then he can get his big contract.
Finally, with the Cowboys going to the Super Bowl, winning it with TO, the players will have the super bowl mentality, which is hard to beat good teams with that attitude.