• Spawning of dragon heads in the harbors (other structures as well?) is borderline exploitation when playing with other mods that add expensive end-game recipes using them. The harbors are spread far apart but then again, playing with mods, it's pretty quick and easy to find them using jetpacks/gliders/etc.

• Disable endgame materials in overworld structures added by the Shrines mod or add an option in the config to do so.

• Another interesting alternative I had thought about would be to add a configurable option to set structures to "stingy" mode. This would entail a considerably less amount of precious ores, valuable loot/building blocks. For a heavily modded environment that makes quite a bit of use of previously cosmetic blocks and offers a lot of exploits, I feel it could really balance this mod.

Disabling the dragons heads is possible. I'm gonna add this to my TODO List so just wait some time. May i'm gonna try to add you second point too, but i'm right now sure how to do.
Also you third point sounds good, but that would mean lot's of work and we don't have the time to do that right now. I hope you will understand

Oh, I understand completely! There's a lot going on in the world right now and trust me, I appreciate all of you devs tremendously! I'm no expert in java language so I wasn't sure if that last point would be reasonable considering the work involved. I'm actually running enigmatica right now but I HAD to have your mod for the server when I saw it, thanks for the quick update <3