WiFi Setup Advice for Max Speeds

You will never see more than about 450-500 Mbps sustained WiFi throughput on Orbi. The Orbi has a maximum link speed of 866 Mbps, and you will only see 50% to 60% of the link speed under ideal conditions.  This is the case with all WiFi devices. There are many WiFi devices with faster link speed than Orbi.

Keep what you have!  The Verizon extender has a 4x4 radio as compared to the Orbi's 2x2 radio, so Verizon has twice the throughput.  The fact that the extender is wired to the router is a better and more stable solution also.  People have reported 700 Mbps WiFi throughput with the Verizon gateway and the extender.  You need the most up to date client devices to get that kind of speed though. Don't expect to see that on a phone or an old device.