Optional paths of teching up/Research
Did you ever play Sid Meier's Alpha Centauri? Next to Master of Magic it's one of my all time favorites because of the way you could play it. The ability to design units based on discoveries was the greatest. But, it had another feature that was also great, the ability to BLINDLY techup/research. You basically picked a catagory of tech but you never knew what you were going to get. Of course the same techs were always in that catagory but when you played this way OPTIONALLY you might not get them in the order you did when you played open tech/research game.
Just a thought of something to add to the Elemental World somewhere down the line. THe reason is most players form a template of teching up or there's always some optimum teching up path to go with and games get redundant and samey. Anything that would make teching up random or mysterious would be great for the game as Sid Meier's Alpha Centauri was.
I could even go for some optional form of teching up that was totally random and mysterious and throwing all the techs into a box and just drawing at one, any one the entire game. Sure some things would become overpowered but at least it wouldn't be the same all the time and it would be OPTIONAL. If I recall one of the later Civilizations did this as something called "breakthroughs" that might give you a tech level 3 stages higher? Is that correct?