I have 4Deco units, 2x BE65 for indoors and 2x BE25 for outdoors, working as a mesh system. It is not bad, but could be better.

Now the signal strength in the mesh setup of the BE65 is not brilliant. It's not a big house, chalet style, wood, but somehow the signals are not much more then medium and I actually have a near dead spot where I plan to add a 3rd BE65 unit (should not need it but am a bit limited in where I can put them) .

Now I thought to put a powerline adapter at each BE65 unit in the hope that this would work as a back haul network between the BE65 units providing them with an Ethernet connection. 

Would linking all BE65 units with TP-Link TL-PA9025P 2000 Mbps powerline adapters as back haul actually work? So basically the BE65's should communicate via the powerline freeing up wifi and also make them thus less dependent on wifi talking to each other?