My history with them is kind of weird I guess. I absolutely loveFever and find it ridiculously unique, creative, and innovative. I think Pretty Odd is ridiculously boring, and that Vices had potential and is a good record but rather forgettable. I really like the direction taken here and think that - between the vocal style and instrumentation - it is executed very well. One thing about them is that they have no desire to make the same record twice, which is very commendable in my mind. Unlike say Mayday Parade.
Funny, I agree with Fever and would agree with PO if I hadn't revisited it a year or so ago and gotten really into it. The way you think about Vices is pretty much what I think about the new one. and I feel about that the same way you seem to feel about this. I agree with your last statement though.