I don't feel betrayed either. It's strategy to not open up too many secondary characters to plots as things get complicated and the basics of the storyline are complicated enough, IMO.
Nancy
How Sleepy Hollow Betrayed Fans, But Why You Shouldn't Quit
Funny - I don't feel betrayed. But then, some of these TV "journalists" feel that if they're not criticizing or stirring the pot, they're not doing their jobs. And I've definitely noticed that the woman who wrote the article is definitely one of them...