@HelpFixDecoApp 
Very simple: I need the router capabilities! In AP mode there is no NATting and I would need an additional router between the AP's and my ISP connection to provide the NAT.
I just want all the features of the Router but just NOT its DHCP and DNS. Your product is in its current setting only suitable for very simple networks. You had the opportunity to make it a mature product for the more complex environment IF YOU HAD LISTENED TO CUSTOMER FEEDBACK 5 YEARS AGO!

 

  @HelpFixDecoApp 

Apologies: this is my 1st and last TP-Link product. To me DHCP is crucial: no DHCP no network, so I run isc-dhcp server on a ubuntu docker instance and on a raspberry pi in fail-over mode. They feed their respective Samba domain server's DNS, which als run in fail-over mode. A pretty solid setup, which I refuse to give up in favor of the dumbed down counter parts in the DECO.

As said: need the DECO to be a solid router, nothing else. For that add-on features like DHCP and DNS should be optional, which is the case in any router I have laid my hands on. The fact that TP-link disagrees means they should not be in the networking business.