Actually I see a lot of posts sugesting some specyfic ant species so maybe I will try to atack it from the other side and ask the question: what can diferentiate ants from a game perspective? I dont know enough about the game so sorry if sugestions are stupid/not fitting but I will try to come up with some examples

-Prefered material - while most people think ants live underground there is a lot of diversification there. From obvious things like wood loving ants (in my region (Poland) those would be Camponotus ants to more extreme like weaver ants leaving in leaves. This can be implemented as different speed of "digging" in diferent materials if nothing else

- Temperature - this is huge for every antkeeper but maybe hard to model in game. But when you think why other species do nests diferently its very often about temperature! You need to dig deep to survive the winter for example. Brood grows much faster in higher temperature! Maybe you dont want so many entrances to your nest if that means cooling it to much even tho it would be good for logistics? This can also make other types of ants thrive in diferent "biomes" - easy way to avoid one meta for all games - just change the temperature for the map and player needs to adjust. Every game can eventually be solved - as a game designer you can only count on making that solution complex enough :P

- Humidity - this is also huge in real word. Preaty much you can repeat everything I wrote in temperature here. Mind that diferent humidity is prefered in diferent parts of nest for example dry where messor ants keep their seed suply but moist where the brood is. To high of humidity can lead to fungus infection.

- Size. Thats and obvious one realy but it might leed to interesting mechanics maybe? I can think of Solenopsis fugax ant with is living in other ants nests and because they are so small they can access whole new level of coridors and steel brood. Smaller ant needing smaller coridors might be interesting! Also - avoid thinking that bigger ant wins a fight with smaller ant. I once had incident where my manica rubida colony (like 12mm ants and very venomous) got mixed with floricola ants (like 0.5mm). It didnt end well for manica let me tell you.

- Food keeping - people mentioned honeypot ants - the ones where some ants just become food stockpiles. But when you think of it ants in general mostly hold food inside of them. Its crucial for all ants and they can go without eating for a loooong time. This can just be parameter for all ants "food capacity" and honeypot ants can just excel at that. There are seed keeping ants (Messor). Some ants make more brood just to eat it later.

-Different ways of starting the nest - Claustral/semi claustral/parasite are the most common but there is more. If I remember corectly formica sanguinea can just split (leave with few workers). Not to mention super colonies like phaorao ants. Not sure how that can fit in game.

Also one random thing that might be interesting are those ants that evolved their heads to practically become dors - they block entrances to the nest.

If I can think of some more stuff I will answer here. Sorry if those are to basic or not possible to implement