My eyes kind of glazed over after "the author's reaction to the fandom probably shaped Dave's character development more than the author." There's this argument of intent that I have exclusively seen get thrown at Hussie in order to... partially discredit her writing? It's mostly used to withhold giving props for things like writing a realistic depiction of a repressed bisexual. But it's not even this specific use of the argument that's ridiculous as much as the form of argument itself. The authorial intent is on the page. If we as the audience are supposed to look at 2009 Homestuck separately from 2015 Homestuck, they'd be different works.

Also Dirk has never not been a creep. It's like the flaw he's the least concerned with. He draws porn of his friends while Caliborn is getting off to it.