Similar issue here. I am able to get through a lobby to the character select screen and see the forms but am not able to display any info, switch them or choose them. It sits there for a minute then gives me: "Error: You have been disconnected from the server." I have not been able to play a single match yet, still.
-Any/Every game mode
-Server regions I've seen: US E, US C, US W
-Troubleshooting: I've re-installed Deformers, restarted everything every day I attempt to play. I have Charter Spectrum for an ISP. I was running on Wifi @ 34 Mbps, problem persisted. Switched to static IP with all PSN ports open, DMZ'd the PS4 IP to sit outside the Firewall, ran at 42 Mbps and still same problem. I don't have any issues like this on anything else I play online. Ideas?