They did classic servers i guess you mean origin servers.Uthgard also meets a very specific niche that people demanded of Mythic ever since TOA came out, but which Mythic never did; classic servers.
I'm seeing a whopping 14 people on Gaheris live right now. Meanwhile, Uthgard has 782 people on it. That's pretty telling.
It doesn't help that I've noticed and reported bugs to Broadsword that I later learned online have been a problem for several years without being fixed despite being dirt simple issues.
Cause classic is mythic idea all addons without toa and origin is without new stats or such but classic si darkness rising those 3 addons in one game origins were an idea of mythic ea forbid em to do.