I think this is the most important thing: if you feel that you put in enough content, it doesn’t really matter how long your episodes are. I personally like short episodes, so to me 6-7 minutes is just perfectly fine, but some others would say that’s too short. So yeah, you can’t please everyone.
For my first story I wrote super short episodes and I received a lot of complains. Lately I’m trying to write longer episodes and even though now I update, like, monthly instead of weekly, I’ve been getting only positive feedback since then. I don’t have thousands of followers, so I’m not sure what would happen in that case, but I don’t want to rush my writing for the fast reads anymore. I just want to make sure that my episodes are worth spending a ticket.