I'm glad that helped some! Agreed, i'm working on some filters and criteria myself to try to limit how and when to respond. I find myself deleting a lot of drafts that Lindy created for me.
I literally just finished writing a flow that includes Lindy learning how to respond! I don't know about system connections for the knowledge base, but if you go to the knowledge base, you can see what is available to add. Hope that helps!