No, not really...

Very simple design.

Was water cooling chosen because it was the cheapest option or for a KISS approach? I have wondered when a serious active cooling system would be developed which channeled heat intelligently.

Something like the way an air conditioner works, taking heat from one side of the craft and automatically distributing the heat to other specific heat shields or portions of the craft.

I am imagining a carbon-phenolic heatshield backed up by a system that might not only cool a craft but provide energy as well. I'm envisioning a 'special order' electrolytic type fluid that can be tapped for electricity like a "cooling system battery" as it absorbs solar ionizing radiation.

But that might make things a bit more complex and expensive. It would be 'cool' though.