The system is flawed if you ask me. If you play well in your season you can bet your behind that you will face teams with 1-3 lvl's higher in the cup matches next season. So you get actually punished for playing well. That is some strange logic. I understand that it is to give you a challenge but the way it is set up now it is no challenge. You get to play 1 to maybe 3 rounds and then your out.
Second, I should be facing similar levels or lower levels as well normally. This is not the case. You will only face higher level squads.
Third, champions league should be the hardest, but the advisaries you face there are often jokes (even though those jokes can beat you). CL is like a 100 times easier then cup matches. Why?
Overall I do not care about cup matches anymore. They are a joke and an annoyance. I simply focus on league and CL and if by some gods miracle I get past the third round maybe, just maybe I start to care again. The current system is broken for good players.