I see from these forums that people have been asking for this feature for years.
I just installed a eero at my girlfriends house a couple weeks ago, and I installed a Deco S4 at my house today. Overall, the Deco S4 compares fairly well against the much more expensive eero. However, the missing bandwidth usage is a deal killer for me.
This is such a basic and simple feature that I just assumed all mesh networks would have it, it never even crossed my mind that tp-link wouldn't have it.
I will be returning the S4 to amazon since this feature is a requirement for me.