You can’t use the WRT1900ACS for gaming, the latency is upto 70-80 ms extra compared to a regular router when you’re on 5G. This is a general problem for the WRT1900ACS. However, if you are planning on using it for personal use, or as a powerful VPN router for Wireguard or IKEv2 then it will most likely suit your needs.
I own both a WRT1900ACS and Newifi-D2