a lot of this, and the motive for the story which made it a lot less ghoulish, was explained by a statement of Brian's during the funeral; that it was very sad for a man who was so utterly unique, so himself, with all of his brilliance, craziness, flaws, and beliefs, had such a mundane funeral which was so unfitting and inappropriate for his character. In many ways, I interpreted the season as a more fitting memorial of John, capturing his personality, his stories, his worries, and how he shaped the lives of so many people who ended up having a connection with him in some way but was ultimately a very troubled individual. Likewise, what happened after his death concerning Tyler and many of the people that knew him in some form, and the level of hostility and in-fighting that resulted from his death, is most certainly, I believe, something John would want aired, something he would want people to recognise and acknowledge.
There's definitely a ghoulish aspect to it being about somebody who committed suicide, but I would strongly agree with the view that it's motivated very largely by Brian's respect and appreciation for who John is, both for the good and bad aspects of him, and a desire for his legacy to be this, so he's not just remembered as somebody who was 'very smart' and received a standard Christian burial devoid of what made him 'him' forgotten by all but the very few people he interacted with and made an impression on.
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