suftfree,
"
1) For example, I would remake squires personal guards - the same thing but not 5000hp and its a hell of a test, namely the number and they are restored by 10% per day or 100% in the city for a fee.
2) Restriction on pumping the castle - (capitol for 2000) (creatures for 30-50% of the total growth)
3) Emerald tower - limit 1 pumping per creature
4) balance of level 8 and 3 grades (it strongly dominates) - Sod and hota are attracted by the fact that they care about the balance of power
5) in the experience of creatures, remove the increase in speed
"

1) (if I get the translation right) Enhanced Henchman Script gives lot of control over Henchman stats.
2) The pumping of gold and creatures has long been balanced in the "Castle Upgrading Costs Mod" Upgrades get more expensive each time you buy them
3) No immediate idea here, but as a rule you can always only buy 1 upgrade. Personally I made the price much more expensive for any upgrade in my game.
4) Easy to edit and you already have done that yourself. Even WoG has options that allows to only hire these creatures in their dwelling.
5) There is an ERA script option and I offered the Stack Exp Rebalance option in Dif Mod that reduces speed from +50% to +20%

I think there are already plenty of solutions for every taste. just collecting them is not always easy ;-)
WoG/ERA is a sandbox environment and we just cherry-pick what suits us. A global balance mod will very likely fail.