Sacrifice? We wouldn't be sacrificing anyone. You guys make it sound like Pogba wouldn't have a say on this. If Pogba indeed leaves for Chelsea, which i don't think will happen, it's because he wanted to go to Chelsea. He's not being "sacrificed" for Oscar or anyone. Oscar would just happen to be a player we like from the club buying Pogba.
I'd only be interested in Oscar if he can forget his defensive duties (due to Scolari and Mourinho's system) and plays his old trequartista role again. I'd like someone like De Bruyne who doesn't really track back as much and can create fast counterattacks in the blink of an eye.
I also don't get this "he's overrated" talk. I've never heard anyone saying the guy's the second coming of Zico, he's just a good player, nothing more.