I'd be satisfied enough if we got some indication that "this is a spell you can learn" once you've seen it, if you don't learn it right away. Got lucky with Ice Spikes pretty quick, and then wasted a fair bit of time trying to learn Blaze Spikes.

I didn't really mind going around and testing out all the mobs in an area, but given the rng, would've preferred some way of knowing if a skill can actually be acquired without just grinding a few and then assuming if it hasn't dropped it's not a spell.

Also mildly disappointed that they had to resort to adding new mobs for some skills. Kinda understand it, end of the day, probably less work than cracking into the old mob AI code to add things. But also just results in "oh, guess that's clearly something with a spell, one less mystery."