That's what I think as well. If you like an episode and you can only rate it from 1 to 5, then you just have 3, 4, or 5 as options. And you'd probably leave a solid 5 for exceptionally good episodes, the best ones in the season. So, you'd still have 3 and 4. Consequently, supposing you enjoy most of the chapters, there would be several episodes receiving the same grade, either 3 or 4, even if some are better than others. In a 1 to 10 scale, on the other hand, you'll have greater options, from 6 to 9,