I named this thread Thut's Suggestions mainly as it would prevent me from going and posting my suggestions in 20 different threads, with probably 19 different original posters.
Nuclear Reactor Related suggestions:
Allow nuclear reactors in "steam" mode to have an input and an output. This would make it a bit more realistic (need to put in water to get the steam) and would allow for expansion, such as the production of a gas cooled reactor, where the input is say helium, and the output is hotter helium (which then goes into some heat exchange to produce the energy).
Have the amount of steam produced based on the temperature of the reactor, as well as the number of fuel ticks, and the production of said steam cools the reactor. This would make it more enticing to run hot reactors, but the steam cooling the reactor will limit it enough as to not make a 1 cell reactor with huge numbers of plates to be able to produce large amounts of energy. (note: something should probably be changed with the heating cells, maybe remove their ability to increase the heat level, but have them prevent cooling below a certain point instead?)
In this system: for every so many units of steam produced, the reactor temperature decreases. The rate of steam production would be based on the temperature, so eventually the reactor would stabilize at a certain temperature. using the modification to the heat cells where they do not let the temperature drop, you could prevent exploits, as if the temperature is not allowed to drop, you have it not produce steam.
This system would make it much more important to balance the temperature of the reactor.
more to come later.