The fact it's made out of cheap plastic and that most of the new features added since the S3 are entirely worthless? Did you read these reviews and get something else out of them?
I really don't see your point in bashing "plastic". First of all they are using polycarbonate which is a de facto standard. Second - owning the S3 for nearly a year now - I could care less about the "cheap feel".
Third - and major point - you need less energy to penetrate polycarbonate with electromagnetic waves. This means less radiation close to your ear. In effect the trend towards Aluminium enclosures isn't something to embrace IMHO.
Yes - I know Apple tries to prompt the message the antenna is on the outer rim of the enclosure. Well - do a signal reception comparison and then start talking again.
I'm all in for less radiation and more battery life. Now if Apple didn't have that destructive patent on Zirconia but actually took that to the market - then we could start talking again.