Hi. Not sure if this thread is still being monitored, and I hate to make my first post here just to report a possible bug, but I hit an apparent roadblock while playing this mod (for the first time ever) the other day.
Playing at my usual Emperor on the standard-issue v.3.0 Scenario map (large Antarctic landmass, massive equatorial ocean with small islands), I random-rolled the Barbarians, starting towards the eastern end of the southern landmass. West to east: Girls[?], Horse, LEGO, me, Char and Boy Union on the southern landmass; Girls (also?) on the big western island, Staff on the big central island, UF — I think? — on the northern landmass. Although I had successfully repelled the Char in the opening stages, and was starting to make decent inroads into the Boy Union's turf, the LEGOs suddenly made peace with the Char, and backstabbed me while hordes of their units were on my turf.
And I couldn't fight them off, because even though I'd amassed a huge pile of gold by that point, and had
finally researched Decentralization (that 50% rate-cap is a b****!

), I discovered that not only could I
not upgrade my 3.4.1. Barbarian Hordes to 5.5.1 Barb Swordsmen, but I couldn't even build them from scratch!
(FTR, in addition to the Palace, I had built my Second Capital Fortress, and the Third Capital Fortress was also queued/underway)
I
could upgrade my 6.1.1 ATAR Soccer Teams to Soccer Raiders, but I didn't have many of those, and most of them were a long way from the core Fortresses by that point (new ones were being built, but 85 shields takes a while to amass when the Barbarians can't cash-rush
either). And D=5 Home Guards weren't going to last long against A=10 Forest Archers. So there wasn't much point continuing, because I was inevitably going to get overrun.
According to their 'Pedia entry, Barbarian Swordsmen have no resource dependencies, and when I looked in the .biq there didn't seem to be any other restrictions in place, either (AFAICT): the Hordes have the Upgrade-box checked, both units are available to the Barbarians, and Swordsmen don't have the King flag either. So what have I missed? What do I need to do to make them usable?
(Also, I noticed that the Barbarians can build the epic-game Mass Transit improvement from Turn 1, which seems a little ... unnecessary? Should that building have been assigned to the unresearchable "Garbage" tech, to remove it from the build-lists?)