Well I think where they were right was keeping the "planet you land on" a relatively blank slate- we know its sort of this lush, a bit younger and more primordial planet, and we are landing on it. Phenomenal, that's all you really need.
Where they went wrong was keeping the stuff that happened before we land so secret - they never said what the great mistake was, we had no real understanding of earth's geopolitics when the ships started leaving or any concept of the faction leaders, who themselves often had their own motivations.
But the district system would be perfect for BE; city projects could really be expanded on; inspirations and eurekas could really spice up the non linear tech/civics tree, etc.
The new city state model of unique suze bonuses would do well applied to "stations." The GS power+ disaster system would fit in amazingly. Fundamental stuff like housing and loyalty would be a really great thing in new colonies. The more unique civs approach would be great too. The orbital layer was really neat too, if a bit under utilized. I always wanted a "Falling Skies" expansion to redo the orbital layer to be more dynamic...
IMO they would have done better to have the whole ideology (aka affinity) system be more of a midgame entrance than right away, and have the first part of the game just be about surviving on your fledgling colony. Disasters on an alien planet could be pretty creative, and ways to mitigate them too. You can import BE art assets fairly mechanically (it's the same as civ5 and deliverator has already imported all the civ5 stuff iirc) and once you have that and a new building set the rest would be almost just a reskin/re flavor text.
I FAR prefer SMAC for that kind of TBS game, myself. BE was very much an unsatisfying alternative in the "colonize an alien world coming from Earth" trope of strategy game, for a number of significant reasons, as far as I was concerned.
Well. If I was taking a stab at a SMAC or BE successor, I think what would be more interesting is re-colonising Earth, not another different planet. Something like the end of Neil Stephenson’s Seven Eves.
Basically, global catastrophe, everyone flees and has to live in orbitals. Maybe some people colonise Mars, Venus, some moons. But all these Orbitals and new colonies suck because, you know, radiation, desperate isolation and humans being really on designed to live on, you know,
Earth. Anyway, Earth settles down, breathable air again and all that stuff, and then people come back to re-colonise the original human planet. But, you know, they don’t want to share and blame each other for causing the catastrophe or have gone totally transhuman bat poo crazy.
The advantages of something like that are: factions are inherently easier to create, because you base them on existing nations and or planets / moons in our solar system; no aliens, instead anything alien you find on Earth is just whatever Earth things have mutated or evolved since you left, or whatever has been created by the catastrophe; no FTL silliness and not suspending disbelief that we found some planet just like ours (which, guys, whatever Elon Musk or whoever says, is really not happening); and more stuff to discover stuff on the planet that has some resonance, because you know it’s Earth but it got left alone for 15,000 years and also weird fiction type stuff happened - I mean, think how weird and interesting City States could be...
You could also have a lot of variety with that model. Maybe there’s a default Earth, where it was an ecological disaster, and now everything is lush, green, wet, but totally Day of the Triffids eat you alive stuff. But you can change the settings and have water world, sand world, ice world starts - whatever - or other alien things. Sort of how Civ currently lets you play Real World Map, but lets you play non-Earth maps with no actual explanation.
Anyway. Just a thought.
...FXS really need to announce an expansion before I go off the deep end...
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@KayAU , you don’t need Aliens to have Aliens. Just look a Dune or Revelation Space. Put humans far enough into the Future, and things could get very alien indeed.]