BTW, I want to throw my 2 cents into the whole improvements discussion. There is actually a degree of flexibility when it comes to improvements, depending on how you actually want to develop your nation, similar to wonder purchases. However, it is my opinion that improvments can actually be more flexible than wonders, as you can do improvement swaps to greatly boost your population at times to have even more improvements, or depending on your relationship with other nations as to what you want to reduce costs on. Improvement "flexibility" doesnt even stop after you have maxed out on improvements, the degree to which improvements, such as border walls, will hurt or help will change as the game and your nation develops. Im my opinion, if you are focused solely on economic development, if you take into account all aspects of the time value of money, statistics will dictate a VERY structured approach to nation development.
Now, back to the Space topic.
It looks like Admin decreased the cost of the Bases by half and also added a nice little touch to the pricing scheme, by having the amount of technology you own affect the price of the wonder. BTW, I really enjoy this feature.
With these changes, a nation similar to mine (Insane Domain) would make:
Total Moon mission cost: $865.880.000,00
Average Moon mission return: $2.383.161,75
Total Mars mission cost: $1.341.280.000,00
Average Mars mission return: $2.636.102,25
Difference in costs: 55%
Difference in return on investment: 10.6%
All in all, with a nation similar to mine, the Moon mission is still 40.04% better than the Mars mission if you take into account the time value of money, depreciation, averages, etc.
Now on to suggestions: Bond markets. <-- this could actually be a game changer for everyone and not necessarily require the addition of new wonders to satisfy the palette of even the largest of nations. It would also give rise to a huge dimension to politics amongst alliances and individual nations and when you get down to it, thats really the reason why any of us play this game in the first place.
Regards,
kocajj