My internet speeds on my satellite units are AWFUL compared to the speeds I get when close to the main unit.  I get 450-500Mbps on main unit, and around 30Mbps on satellite units.  I have seen where others have disabled this using TelNet on previous firmwares (1.0.2).  Is there anyway to disable this on the newest firmware or to downgrade firmwares?  I have seen where TP-Link has responded back saying that it is un-needed due to the newest firmware prioritizing powerline backhaul over wi-fi, but for me, this is not the case.  I am unsure if there is something additional I need to do to get the powerline backhaul to take priority now after updating all units, or if it is just simply not working over the wifi backhaul.  Any help?

Thanks in advance!