Okay !
Sorry to hear that.
Is it going up again if they were to upgrade their server ?
Or is it gonna stay this way.
It will most likely stay this way.
The change doesn't have an impact on your gains.
The only impacts on my gains lately have been big users coming to the pool which results in less shares distributed among all the workers throughout the pool. So if you see less gains, its due to more people mining on the pool than before.