I think everybody his afraid of Camp Nou tbh. We're more than decent as long as we get our defense together and it worked tonight...
Definitely Barca are very strong at home, but that has always been the case, even in a still being worked on Camp Nou.
In saying that, there's a few teams I feel would have little fear of going there - Bayern look great right now, and Arsenal would fancy themselves to keep a clean sheet and steal it on set pieces. The latter could happen but obviously you cannot meet Bayern til the final and not play them at home, so a moot point.
I was highly critical of Flick after the Inter tie last year, as you maybe remember, so it will be interesting to see if he has learned lessons when the bigger games come (assuming get past Newcastle as never wanna count chickens). I do believe Barcelona can beat Arsenal if Barca click over the two legs, because I am one of those who suspects that Arsenal are benefiting from a poor standard in European football right now, rather than being an exceptionally elite team themselves by a usual high standard. But that potential tie could go either way. Arsenal having home advantage second leg if you both make it that far though is a big plus for them.