I think Justin getting a worse sentence than Bryce was meant to highlight that in many cases, this is how they turn out. Not a lot of reported rapes go to trial, and the ones which do are not always sentenced fairly. I think this in itself is meant to provoke a reaction from the audience and encourage them to be proactive in their own lives to try and change this if they can, or at least know that it is an issue.
Additionally I think it highlights that, even today, those who are richer are treated better. You would expect the courts to disregard people's wealth and focus solely on the crimes they have/have not committed, however in Bryce's case it is obvious that his wealth played a part in his sentence even if it was indirectly.
The reason why I like this show is because it is accurate in portraying the way that people can behave. In season 1 when Hannah received a lot of unwanted attention; the list, the date which was just a dare, the shared photos. This attention was a type of harassment which is not your typical bullying, but is still completely able to happen. The attack on Tyler was very disturbing and I found it quite difficult to watch. However I do think it played a part in the show. There are thousands of schools across the world, and I think it is very likely that an attack like this has happened before.
The next season should focus on the lives of the students, without any regard to Hannah. They have all got their own stories to tell and have to continue living life. Showing that life continues after death I think is an important message. I would like to see where they go college, and essentially what happens next for the living characters.