Okay, seriously, WHAT ARE YOU TALKING ABOUT?It wouldn't be crazy at all, I've just viewed some saves, looked at what units would cost with a double cost and my conclusion is it wouldn't be crazy, it'd be by far the worst UA in the game unless we buffed it from the state I've suggested. Double maintenance cost units would be so high, not even Ducal Stable + UA would give you +GPT during the game unless you really had tons of pastures and probably reduced amount of used units (elite but few - fits, Poland in its golden age didn't have many soldiers). Otherwise, you'd probably need Cathedral and/or Thrift and/or Gold Monopoly at the very least to get even, let alone get money. AI playing Casimir would definitely be crippled if he didn't start next to a +Gold monopoly while being smart enough to prioritise it because he'd spend his money on roads too. Seriously, late game that'd be way more than -100-400 Gold per turn in many cases easily, that's not worth the gained Production, let alone be good or crazy. I remember one large game I've had 400 (or even 600, I forgot) unit maintenance in industrial era, and that's despite having free Imperialism garrisons and Authority unit maintenance discount. Without those, I would be losing way more. Pretty much the only way you'd get positive Gold that late in the game is if you also deliberately took that Autocracy policy that lowers all maintenance costs, but being forced to take a bad policy when others in the same situation can take good ones that actually help at conquest is not good. Still, even if you could get +GPT all game, the lost Gold from unit maintenance would not be worth gained Production, which is why other parts of the UA are meant to compensate. It'd need to be +50% unit maintenance cost (and/or not include civilians) at most to not be a detrimental UA overall, but it's unique enough I'd say. Investition could also, instead, have it's Gold cost halved, but even with +50% unit maintenance cost the UA would probably need to provide 1C 1GGP 2Gold per policy to not drown Casimir in early game debts.
I'm saying that letting you instant-buy buildings is crazy, your response is to not ever mention buildings but instead talk bout some unitmaintenance that I don't care about at all.
It does not matter if you want to compensate for that insane ability with other abilities, the idea is still by default insane. Instant-build was removed from the game for a reason, and the game is adjusted to work around that fact.
Doesn't matter one bit, it's still the exact same UA, with worse implementation.Still, even if above wasn't the case, Babylon also gets a free Scientist and faster Scientists.
It's kinda as if you suggested that Poland should get +6 movement for all mounted archers along with four times the maintenance, it doesn't matter if the Mongolian UA lets your mounted archers ignore ZoC, it's still a blatant rip off.
I don't agree, a find the idea of free social policies an abomination. It's encroaching way too much on wonder territory, it varies in value way too much to ever be balanced (as the free policy is always worth as much culture as the next policy, or in this case the next X policies) and worst of all, it completely ignores the idea that culture leads to policies.Discount on policies is way less fun than getting free policies starting from medieval which I'm sure you'll agree with - in one case you get a golden notification with a sound and get to pick one knowing only you do so, whereas in the other you might not even notice it's influence. It'd probably be better to just give a SoPol on reaching Chivalry or something, but whether discount or free one or two, your something fun part would really need to compensate. Can you suggest something? So far I see that almost no one really likes current UA (with me being probably close to neutral but something new'd be cool) so I make suggestions but nobody else makes his own. Make your own, full suggestion containing what you'd consider fun.
Fun thing could be something like Yields when you enter a new era, yields when you adopt a policy. WLTKD when you enter a new era, WLTKD when you adopt a policy. Minor golden ages.
Could even have something along the lines of 'whenever you adopt a new policy, all cities grow 1 pop and generates 100% of their yield output' That 100% is of course just a placeholder value.
That along with cheaper policies would represent faster and better reforms, something which Casimir was famous for (I think?). Of course instantly gaining one population have some power-gaming value to it, which I'm personally not a fan of. But in general cities don't really tend to grow that much slower as the game goes in in CPP (unlike in vanilla), and you're not really that much in control of your culture output.
Reason why I don't want to make full suggestions is because I don't want this to be a one-man project. I've already made suggestions on how to fix the Ducal and the WH.