Had to post this on the BE65 page since TP-Link doesn't recognize the BE63 for some reason which is probable why I am having issues with this device.

Just bought a BE63 2 pack and I have Tachus 2.5Gb Fiber.

I have ran speed test direct from the modem and I get 2.5Gb up and down but once i connect either of the satellite routers the down speeds are capped at 250Mbps for LAN and WiFi but I still get the 2500 up speeds. 

If anyone has a suggestion for a solution let me know.

I have an open case with TP-Link that has been escalated to the engineering department now for an answer.