To be fair, one should be forgiven for thinking the main difference between difficulty levels is....the difficulty.I never specified my opinions were specifically at the Apollo setting before I tried it. Indeed, they're more generally applicable for the reason that I formed them out of experiences at multiple difficulty settings in the game. Arguably, if your opinion is formed only from a small segment of the settings, then there is an onus to specify so.
Too many Apollo-only players presume that the difficulty levels below Apollo are "the same, only easier." This betrays an arrogance and an ignorance about game mechanics onto which I've been at pains to throw light. Apollo isn't necessarily harder just because the game says so. You don't necessarily know how the game is at different settings just because you're playing on Apollo.
Honestly? Apollo is at Emperor level. I could tell that just by counting up from Sputnik and counting off normal Civ levels. It's not that hard. Playing at it gives you no special insight, other than conditions specific to that setting.
I think adding penalties to negative health will probably fix the expansion problem, presumptively because health is the governing mechanic for controlling expansion. I'm not sure how that's a far-fetched idea.
I've played on Soyuz and Gemini also, and I didn't find it to be any more interesting. I don't think I need to specify diff level in a general discussion about game concepts, however when arguing with people who specifically talks about a certain diff. level, I would make sure I tried it first.
Also, when the tooltip for apollo says "nearly impossible" one should expect a deity level, not an emporer level. When the number of levels are reduced, there could be a bigger gap between levels, indeed that was the intended design (as the devs specifically claimed Apollo would be equal to Deity).
Health in its current form does not punish expansion enough, even when self imposing a rule where -0 is not allowed.