Okay I only looked quickly over it. I saw a comment a day or two ago suggesting the dev doesn't help if something happens because of stuff like this?
Sorry I don't quite understand what you mean.
If you mean that developer of the game will not help you if you experience any bugs while having mods installed then most likely yes. Not because he doesn't want to but because he might not be able to. You can't always determine if the issue happened because of the mod or not so it's harder to help with that.
So an inherent risk of using mods is that it might make your saves incompatible with the base game. Caribdis (the developer of Eternum) can't really help you fix saves that break in that way. We have tested the current version of the mod with the latest release of Eternum (0.7.5) and have verified that both modded saves work in unmodded games and unmodded saves work in modded games. This *could* change when the new release comes out this fall, but I think it is unlikely. If you run into any issues let me know and I can probably fix your save for you.