The tension design is imo not that inaccurate for the Spartans and Athenians, they seem more focused on an earlier time frame. Now for the Hellenistic civs it would be (BTW i just noticed the Seleucids seem to have no bolt shooting artillery). Polybolos is already in game, but only for Ptolemies.  

Maybe try clearing the caches folder for 0ad, that might help. Did you restart after upgrading? If that doesn't work, maybe try reinstalling 0ad

I just upgraded my Mac from Sequoia 15.8.1 to 15.8.2 (so not a massive jump), and now 0AD starts with a black screen. It's 0AD 28, and worked fine before that.   I can see the arrow pointer (0AD's stylized spearhead), and if I manage to click in the right place, I can hear the click sound. I can also hear the music.  I tried clearing the Application Support folder with all the config files, but that didn't help. Any thoughts?  Thanks

I have been working on updating the illyrian mod https://github.com/0ADMods/illyrians from a24 to a28, https://github.com/ThePoshBarbarian/illyrians/tree/a24Toa28, though haven't touched it for a bit now, I have at the very least ported it near fully to a28, might still be a few issues though. And still no civ bonuses, unique techs, building, or team bonuses unfortunately.

Where did you find the map? Is it part of the base game scenario maps? Still great work Atrik.