As you can see in the forum, EAC is currently the issue for too many.
I already Skyped with the Eleon Dev about it even.
He said EAC is sending a “ping” package over the network every 90 seconds. If EAC does not get an “OK” back for that player from the Dedicated Server, it is blocking the authentification and the player gets kicked / can’t login anymore for awhile.
As bad as it sounds: it is an issue of the players in combination with the surrounding of them.
You see hundreds of players can login and play fine but they are not in your area which might be an issue too.
We already pushed the CPU affinity of the server towards the dedicated.exe but we can’t boost the communication of EAC and the dedi.exe.
TL;DR: we absolutely can’t do anything about it but only blame the bad performance of the game in Multiplayer, which is not ready for “so many” players in 2019.
There are some experiments we can do, like decreasing the range of DSL, so you don’t load tons of structures in a wide range.
But, as always, this opens up exploits in PvP for some sneaky snakes…