I do think that the show did a very bad job building side characters. It did better in Season 1 and 2 when it gave some episodes to side characters and they reentered the plot at times again. The characters actually had friends outside of the family. The way they just have random people show up at times is really silly. Like when the characters had to drink that drink to save Snow and Charming. There were just random extras in the scene. The town just doesn’t really feel peopled.
I am not sure if i could rewatch at this point. There is just too much bad in some of the later seasons. I sometimes think i need to rewatch 5B because i know i didn’t watch it very well. I think there were even parts of episodes that i just completely missed. 5A was so bad that a had very little interest. I think 6A was an interesting start, but once again nothing interesting came of it. They started interesting arcs and just did nothing with them and the end had no real connection to the beginning, so 6B was just so boring. That is the problem. The show is boring now.