This conversation has been merged. Please reference the main conversation: Ratings: Show season ratings for TV series.
I find none of those particularly suited, when considering the diversity in style which comes from one season to another. Take for example True detective, which has now started it's second season, which has nothing to do with the first one that the public appreciated and loved. The current rating system forces you to give the series one rating even though there are really two different movie projects.
The episode voting is not much helpful either, as people don't remember what each episode brought to the series, unless you vote a rating right after you've seen one, which i doubt that many of us do.
To put it in a nutshell, the current rating system for TV series works something like if you'd have to give The Godfather part I,II and III just a single rating. You just can't!