If Moss was here, I still don't think we would had won another SB with Aikman due to coaching .
I do believe that with Quincy Carter, the offense would be better if the Cowboys were able to have Irvin or even Ismail (remember this was a guy that had a 1,000 yard season in the first year of the Cowboys) to pair with Moss instead of trading for Galloway because Carter could throw a deep ball while the team gets better with the picks. Also, the running game would have been better which would result in Emmitt Smith staying because the defenses would have concentrated on stopping the long passes.
The question is would the coaches before Parcells would have allowed Carter to throw deep more often than he actually did because the Cowboys offense was too conservative (especially in the redzone where it was a guarantee the Cowboys would kick a fg once they got there)? If they did, Cowboys wouldn't have gone to the aging qbs and Romo would have chose another team.