Idk if anything has changed in Blotz's farm, but I think mine in Kaktolake may also have got a lower rate.
I investigated its rate and documented it in one of my old YouTube vids from when I built the farm, that could probably be compared to how much it produces now to get an idea of whether it's a general problem on the server with lower spawn rates.
mob spawns overall are lower tho
Compared to when? How do you know?