I really like it! It definitely doesn't have the edge that Brand New Eyes but that's to be expected as the band has said numerous times that it's a happier album. I'm going to hold out finally judgements though until I hear the full songs.
I want to like this, but Hayley's vocal delivery is just hitting me the wrong way on the vast majority of these tracks. It seems like her entirely delivery is much more terse and staccato than on past albums. It seems like she is mimicking the guitar parts (which again, are a lot more staccato and lead-based). The thing I've loved about Paramore songs are the full bodied bar chord guitar parts along with Hayley's soaring vocals over them. Maybe a few of these songs will grow on me, but I just don't see this being as much of a hit with me as anything they've previous released. I realize I'm basing this on the clips (which is a cardinal sin here), and believe me I'll restrain my full judgement until the album is released and I can sit down and listen to it. Just wanted to offer my $0.02 on the clips.