Teams make trades because they believe that they will benefit from the transaction.  So a player not playing well in one scenario will likely play better in a different environment.  To a certain extent, that is expected.  But it is expected on both sides and there are plenty of examples of Leaf players playing well that were not on their previous team.  Looking solely at how Leaf players and coaches perform in a different environment is a one sided biased view of the situation.

And by the way, if you are asking what the Leafs have to show after 100 years of playing, that would be 13 Stanley Cup Championships, second only to the Montreal Canadiens and better than all the other 28 teams.

Of course, I think you meant to say what the Leafs have to show for the last 48 years.  But let's not let the facts get in the way of a good insult.