Well, I'm more clueless right now than I used to be.
Would it help if I posted the dmesg log from the original Android kitkat firmware? If so, here it is: ZeroBin.net
I have a feeling that the wifi chip in my MK808b+ might be the ap6212 and not ap6210 based on info from this post: Boyden, Mark - MK808B Plus Android TV Stick for Home Theater - Home Theater - Content
Let me know if I can provide any other logs.