Winning against all those other teams are understandable, winning against Barcelona is different. I am not saying United will lose or anything like that, they could still end up being the winners, but at the same time I am saying that this will be harder than almost all of those home games, because they are facing a team that by all accounts should have been in UCL and not europa, they are a very good team.
United of course got better as well and they are very good but that doesn't change the fact that both teams will face very tough opponents and we have no idea how it will end. I still root for Barcelona obviously, but have to say it's equal powers fighting.
Before the first match, I thought that Barcelona would dominate, at least in the home match for sure, but at the Camp Nou it was a very equal game, and I even liked more the way Manchester United played. The second match will be just as difficult for both teams, but I am of the opinion that Manchester United at home will be even more dangerous, and they have an advantage because they managed to score two goals away, but this is not a very big advantage, all the struggle in this confrontation is still ahead.