The idea that a mechanic is no longer WAD because of players exploits is enough for me to accept it's removal (and i call it a player exploit not because it used to give a huge boost to the hordes but because the ai was completly unable to use it, and i don't like mechanics that can be used only by human players)... no need for more then that...
1) Players exploiting a mechanic should never be sufficient cause to remove that mechanic, especially when the mechanic is long-standing, WAD, and the removal has consequences beyond the alleged exploit. If the offending exploit has no meaningful impact on anyone else's games, why even consider a nerf to begin with. Better to investigate why an exploit is deemed necessary and address the underlying issues. And, no, redefining mechanic that was WAD last week as not WAD this week, simply because you don't like how one small group of players is using it doesn't really work. Nor is it convincing to assert that the mechanic isn't needed or useful, anymore, when that is simply not the case.
2) "huge boost" demonstrates that you really need to familiarize yourself with this mechanic. I suspect you also need to familiarize yourself with Horde play, too, if you consider the reform process appropriately "hard".
3) Did you just assert that all mechanics that are only used by the human player should be removed from the game? Does that include the new ones they're releasing today?
Hordes should just be removed from the game as playable nations and all their provinces turned into uncolonized areas. We can represent the Tatars and Mongolians with native uprisings when you attempt to colonize the province, just give them 10k strength and max ferocity and aggressiveness.
Don't joke. If I search through ancient disks, I suspect I can find a version of EU that models much of that region exactly as you describe. So I do not consider this option so far-fetched.
So, I'm with Wiz in general here: the way player hordes were recruiting in other cores didn't make a lot of sense thematically, the AIs weren't doing it, basically it wasn't the intended use of the mechanic. I can understand why it's been removed.
I like being with Wiz, too, but I can't understand why they didn't address the root problem(s), instead of removing a symptomatic response. The root problems are fairly easily addressed, as you, yourself, demonstrate in your next two sentences. This mechanic is hardly an ideal one for Horde players, it's just the best they can come up with. But it is (was) a moderately useful, entertaining, and historical mechanic for many players in niche situations. No more, for no good reason.
So they should, I think, get upgraded units at various stages above tech 9, even if those units are distinctively poorer than those in other tech groups. I don't think they'll be OP as a result.
See. You just fixed most of the problem, right there. And you didn't have to remove a perfectly sound game feature.
Secondly, the event to reform government should have it's requirements looked at, so that it's practical, possible, and even likely from the sixteenth century onward. Without having to rely on good fortune. It's something that players should be able to engineer, and that the AI should be able to do reliably.
And the even simpler, more elegant solution that has been proposed for months. And ignored.
Instead they chose to nerf Hordes more, with little of no apparent thought of collateral consequences. Why? Still unclear, but one begins to suspect that it's ingrained behavior by now.