Talking about Barca like we're still in 2009-2012
the team has drastically declined since then. They're not the same team they were under Pep and don't play at that intense level anymore. Fuentes is no longer around to dope them up.
Barcelona and Chelsea are in the same tier. I would only put Bayern and Real Madrid above them. As I said before PSG are a tier below Chelsea.
PSG only have 1 good centre back in Thiago Silva. Cahill/Terry had to carry Luiz for the best part of three years. The central midfield of Fabregas, Oscar and Matic is better than the one of Matuidi, Motta and Veratti. Hazard's also midfielder
.
PSG won the game in Paris last year off 3 silly errors, not due to being the better or superior team. This was against a broken team with no recognised striker
. It was an even game and Ibrahimovic didn't do anything in it
. In fact Ibrahimovic being out of the second leg should have worked in PSG's favour as Cavani up front with Lavezzi and Moura supporting should have allowed them to counter attack better and much faster than if Ibrahimovic was in the side. They were restricted to one chance for the whole game, which Cavani blew.