For me it's the opposite actually. They played smart. They started strong, scored 2 goals quickly with ease. They avoided wasting too much energy after they felt like 2-0 was enough, which it most likely will be, so they focused more on preserving that and making sure they didn't allow an away goal, since they're fighting on two fronts like crazy, can't afford any screw ups in the league too, if they want to win it, which is still their priority I think, since it's been 29 years since they were last champions and their fans are even more eager to break that curse.
Their defense is scary good, when you compare with the shit it was just a year ago. Amazing how one world class defender can change that. Not to mention their counter attacking game, which is even scarier, especially for our high, but kinda slow defensive line. That said, I still believe we can hurt them right back even harder with Messi, Suarez and hopefully by then fully fit and in form Dembele, especially if their league table will still be as close as it is right now in time for the semifinals. But, first things first, knock out United first. If we do though, gonna be two cracking matches, might just be the highest anticipated two-legged tie in the last 5 years for sure. A Barca-Juve a.k.a Messi-Cristiano head to head final for the title and the record 6th Ballon'd Or will be the only thing topping that, if it happens.