Barca played the first leg without Busquets which made their team`s midfield weak and the only guy who could help their defense was suspended...
PSG are not perfect but you cant compare their defense to last year`s Barca..
The way I see it the favorites are Bayern with Hynecks then they have Real because they are Real and I believe they will get better by February then Barca and then PSG (We are with City on the 5th as City is too much flair IMO)
how can both Real and PSG be among the top3 favorites, if it's set in stone that one of them won't make it to qf?

you must rate the other 13 teams pretty low
if you believe that a full force PSG 2016/17 might be better than that specific Barca team of 1st leg against Juventus, I might agree, but that's a strange comparison, because inevitably PSG will also have some guys missing or out of form.
my point was that Barca had everyone available in attack, was fresh from scoring 6 against PSG and couldn't put a dent in our defensive wall. after that I'm not afraid of any attacking combination if it's not supported by a great midfield like Real's, because that's where our weakness lies imo.