Kolobokk
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P.S. And the most important thing is that a player who uses the mod knows the original and will not have much trouble going back and playing on version 3.0 properly - but for a person who is not familiar with the mod, in order to remember and feel all those changes in practice, they need to play at least twice with each faction...
No, it's not a problem; I play both the original and the modded version, and there is no difference for me. And regarding getting used to it, the changes are hardly noticeable; some moments just don't work as well in the game, and that's all. Those who have played the mod know this. The best way to test the theories is through practice. And without it, they will just be simple arguments.
Playing twice with all the factions - well, is that really a problem? It's not even about that; you just need to try it and decide for yourself what is more interesting, and there is no need to force yourself to play with or without the mod.