I'll give a stab at answering two of your questions, please forgive me if I'm incorrect. 1) "Rushing" I believe means that they can rush production more than once across their empire. They can rush production on more than one colony per turn. 4) I think that those videos for the 'first of X' you see in each game are just pre-made movies that the game plays when you hit those 'milestones' each match. Thus it doesn't actually use what'
Zereth D
I've had to just not use the request constructor feature at all. My starbases require so many modules to complete that only my custom designed constructor can keep up and yet I have to continuously build them and then hunt for the starbases which require them. Thankfully I only ever need two of those beasts now to fully upgrade a base from construction to maxed out, and that's with having one ship provide 46 construction points.
It might also help if the number of dead worlds was reduced. Doesn't the game generate habitable worlds based on the star/systems that are generated? I would really like to see either fewer dead worlds or technology to terraform those planets into some useable form (even if it's poor/barren or extreme). Like how in MoO2 you could transform an asteroid field or gas giant into a barren would and improve it from there. I cringe to think of starting anoth