Did you find any suitable alternatives that don't break the bank? I am also fed up with TP-Link's inability to listen to their customers...

  @GeorgeBark no, my solution is to run the guest WiFi connected to the guest vlan from my routers WiFi only and for my work laptop that's too far away for the guest WiFi so I have used ethernet over power.

 

Down side is my home WiFi has great coverage, but the guest is as bad as it was before... Where if they just sorted the vlan out so its over the Decos and output to the router I could have great for both.