I'm just using various unknown software to rename windows, align them next to each other and turn on/off activate window on hover Windows setting without rebooting. I just cancelled my accounts, as the word streamline is so vague that there's no way to know if you are within the rules. In vanilla I used to have two computers and would control a healer on follow with a dedicated numpad. For me even that solution could be categorized as "streamline multi-boxing in any way".

I might activate an account to try TBC, but they aren't getting any extra subscription money from my end before they clarify their statement.

I hope more people are cancelling subscriptions and giving feedback about the vague rule change they are incorporating here. I really feel we deserve something more concrete to go by.