In short, some creatures had abilities removed that significantly enhanced them. As for recalculating the main parameters, it's hard to say – I don't know what you suggested before.
Well, I thought so too, that they just nerfed things, but deep down, I still hoped that they would actually do a real rebalancing, but alas...
Here, take a look HERE... and in general, someone needs to take this on and do it; I can show where to get the file for rebalancing and which buttons to press later!
By the way, as far as I understand, you have no problems with free time (judging by the number and volume of your posts on this resource and in various social networks), so you can make a great contribution to the Heroes community if you channel your energy in the right direction (this is not irony)! :smile25:

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Неудачное планирование ведёт к неудаче ...
NCF - мод, добавляющий дополнительных существ в HeroesV 3.1