Kinetic slag presses keep on getting stuck, I think you should make gold and spores come out of the press at full speed so that they won't clog, and it probably wouldn't be too hard either. I know you can use launchers to stop it from clogging, but it is sort of annoying tbh. And can water please be heavier than slag, gold, redsand, and voidbloom? That would be so nice.
It's more of a mechanical issue rather than a realism issue. There's literally no way to drain water cleanly if it falls into one of those resources besides covering the area with water pumps. And water can also cause blockages when you use a filter or launcher.
Allowing water to be heavier would allow you to drain it out from the bottom.