@EPP
We will send it up again but to reitterate we cannot gaurantee any request will come to be. As it is the Deco and Mesh in generally were not designed the same way that traditional router are. MAC address control list were not part of the orginal design because traditionally they were used for devices who were allowed to access the router. Yes in some cases they have transitioned to Access through the network but with Deco Access to the interface is determined by who is listed at a manager and owner. Unless your TP-Link ID cloud account has this distinction you cannot access the interface. For Devices that are allowed to access yes a white list would be better because it stops anyone who is spoofing to not get access.
If we do hear anything back we will make it an official annoucement.