Regarding the enemies getting the new skills; it would be too much work honestly for little payoff, and involve replacing Global character templates with one that points towards a Script that uses the new skill instead of the old one. I haven't worked out how to replace a Global character template yet, since those aren't like normal RootTemplates.
Meh. Hopefully Larian allows editing main skills soon then, instead of making you create a new skill then having the path for skillbooks to those. If you could edit the main campaign and original files instead of having to copy everything and re-route it, things would be much, much simpler.
Longer term difficulty adjusting exists with the enemies, unfortunately. And, that takes a long time, adjusting (if/when given access to editing current enemies). A quick adjustment could be adding more or different enemies to certain encounters, or new encounters in different areas. From what I understand, you can only add things to the main campaign. Even something like mini bosses within certain encounters would be interesting. I only mention this to be in line with the harder difficulty.
This is down the road though, after spells are hashed out.
