The size of this game is causing the planetary fiddly bits to become aggravating. Remove those 4 projects from the game. Remove the spaceship build versus planetary build slider. Have any manufacturing that isn't used on planet get automatically used for spaceships. Notify the player when the planetary build queue is empty and there is empty land.
I'm curious how one can build a ship and a factory. Wouldn't I be using all my production in building the factory, and so when the project is finished then I will build a ship? Would it not be faster to divide the labor between the two? Also, what if I'm under attack and need fighters, but I also need to upgrade my manufacturing. I would therefore have to stop production on the planet in order to have ships be built as there wouldn't be any excess production per turn if that production is all used for planetary items.
Also, if any production is not being used in the shipyard it is automatically moved back to the planet.
Wouldn't a more balanced approach be better on a planet instead of a purely manufacturing planet? Also, if one has built something on each tile in a planet, and the empire cannot support anymore ships, we would leave the production on the planet to sit idle? Wouldn't it be better if the production were changed into something more productive?
I think the complaint here is about the balance. When you use those research projects, is having a couple research buildings better than just a purely factory based planet doing research projects. It should be a loss on production when converting to research or wealth. Sounds like a balance act. I would say that 3 factories with research project equates to 1 research building with the planet using the research project. (I'm just throwing out the numbers here, I'm sure others have better number ratios than this)