My latest rookie tournament has been wickedly easy. I don't know what changed - I only switched a player's team which improved the line chemistry from red to yellow (and this was on the third line). Maybe there's something to what DuClux said, about winning makes your team better? There doesn't seem to be a change in the chemistry rating, though.
And my main gripe now is that I run out of game contracts before I can make enough pucks to afford the gold card set. So, yeah - my rate of pack purchasing has been slow, so I haven't been able to contribute to the card collection effort.
I need to get good enough to start earning pucks in more difficult tournaments. Don't know if that will happen.