Yes, some epithets became unachievable after the previous update. It should be fixed in the next update!
I’ll have to come back to the translucent node stuff later, probably after I finish the first school year content, since the data structure is still changing a lot during development.
More Shadow Comprehension nodes will get added as new calamities come in. For now, it should be possible to clear the demo just fine without even touching the second row of upgrades.