Any insights will be helpful.

  @David-TP thanks for confirming David. How frequent do the Decos receive firmware upgrades? Would you know if this feature is already intended to be included on the next upgrade?

For a home user, I just find it very weird that guest networks don't have limiter as this is the main purpose for having a guest network (probably more than to isolate files & folders  - which can also be restricted through an app). 

Your help in communicating this to the development team will be helpful. And if you can find out if it's for release the next update will be much appreciated.