the point was that they've traded one security risk for another. marquinhos have scored own goals both for the national team and psg aswell. clubs were paying out the ass willing to offer tons just 1,5 years ago. that intrest has pretty much dissapated completly after his performances.
don't think you can say arsenal's offense has looked bad either, they've scored plenty. yeah the game saturday came clutch a bit late, but it was pissing down from minute 1 to minute 90, so it was far from an easy game to play. they looked exellent all preseason, and have scored what in the first 4 games? 8 or so goals? 3 against liverpool, 3 against watford, 2 against soton. yeah they had the draw against leicester, but that was a weird game allround, and just like saturdays game the weather conditions were really bad.
none of the teams are the ''back home'' type, so it'll most likely be an open game. and you didn't mention arsenal's offense at all. unless ''playing soft'' means offense sucks, or ''hard game'' means offense sucks.
none of them mean that though. and not been ''quite the same'' is the under statement of the year. last season they wen't undefeated in ligue 1 until the game away against lyon, that was in february 2016, they only dropped points to real madrid in cl up until that point.
this year they've played four, barely beat bastia away (kursawa saved them) beat metz at home, lost 3 - 1 to monaco away, then fumbled against st.etienne at home.