Idobox

I'm pretty sure titanium oxide can't be much more oxidised than it already is. Using a titanium casing is not very difficult either. About containing the nuclear fuel, an idea I had some time ago is to use electrodynamic levitation to keep it in the middle of the chamber. It uses a lot of power, which is lost to heat, both in the coil and the fuel, but it should be possible to deal with it. After all, you're building a nuclear reactor. A MHD generator could use the exhaust to get power for example. The main issue with this technique is that your uranium has to be conductive, and will likely have a spheroid shape, which is not ideal for controlled nuclear reactions. To keep the uranium metallic, you couldn't use water directly, but one can imagine electrolysing water, injecting hydrogen into the core, and then mixing the two flows. To reach safe criticality, I have a few ideas, but I don't know enough about nuclear reactors to estimate their value. You could use spherical neutron reflectors, or have several liquid uranium balls with moderators in-between, or maybe find a way to shape the uranium in rods.

As said, the connection between blocks if far from being trivial. Heat dissipation could be a problem too. A solution would be to have a less modular system. Have a CPU/GPU block with constant size, and a specific place, same thing for the screen, memory and wireless blocks. You can still change parts when they break or get obsolete, but with fixed positions for these central parts, you can now have specific connectors and high through put buses. For the other gizmos, like additional memory, camera, etc, a usb or similar port could be used.

I think the devs want to keep the game somewhat realistic, so very cartoonish things like conjuring doors or seven course meals doesn't really fit. But having them behave like total idiots would be fun. There has been a lot of focus on snacks, and I would love my kerbals to taste different types of soil. I would also love to see them use the worst possible tool to do tasks. For example use a hammer to repair a broken solar panel, or a drill to repair a wheel. I would also love to see them use incredibly complex ways to do silly things, like a camp fire powered by liquid fuel. In the same vein, they could have small animations in IVA, like trying to play board games in free flight, eating, throwing paper planes. But this kind of things take quite a lot of time without being really useful, and I think it should be reserved for the late stages of the development.

On Earth, everywhere we find liquid water, we find life. As a result, we think liquid water is a very good indicator of possible life. Finding life anywhere, even if it has a common ancestor with Earth's, would be gigantic news, and would mean space agencies would get tons of money to send probes to other candidates. Europa has the closest environement to Earth, and whatever we find there will be very interresting. If there is liquid water but no life, Earth's cousins or separate life will teach us a lot. The imbalance in Titan's atmosphere an be explained without life, you just need a catalyst. Sending our one probe there and coming back with some boring non biological life while not knowing what happens in Europa would feel like a waste.