Cable management is a complete nightmare, which is why I've gone so nuts with the braided cables, as they'll have to be on show just tidied up somewhat, if I end up struggling I may put some trunking in for the cables to sit in. It doesn't help that the motherboard tray is actually bolted to the rear panel, you have to take 3 screws out of the motherboard tray before you can start removing the rear panel.
Well designed for water, not for cables unfortunately. That said, for the price I paid for it (switch 810 price range) no other case comes close to it for radiator space.