The show got blasted recently in a scathing entertainment article. I agree that the show could have been better, but it's a great show and they called it a "disappointment". The expectations must have been too high.
I thought they made 2 big mistakes in their writing. I wish Nucky would have given Jimmy the 2nd chance, and killed Eli instead. Then around season 3 Jimmy takes over so Nucky can retire. Show should have been about Jimmy. I'd love to see that show. The other mistake was not giving Rosetti a 2nd season.