Sadly I'm one those affected, and nothing I tried worked (factory reset, static ip, various router settings), and the box is pretty much useless for my me at this point. So my only hope is a patch, but I didn't see any indication on when I should expect one or that Xiaomi are even working on it.
I've looked in their official pages and couldn't find any mention of the update-related problems of the Mi Box. They haven't replied to my email as well.
Most of the issues you list is not a Xiaomi problem. Only auto refresh and resolution is a problem.