On the levels, I was def under leveled for the hobs - the problems I had with the lone hob should have clued in that I wouldn't make it. As far as explaining "level expected to beat it" goes, I would wait and see how many are struggling with the hobs. Might be a good idea, but barring boss fight I did OK at level 12, so I'm not sure it's needed yet.
Regarding the attunement, I started with wind magic, so that would have been the initial school. I was able to learn water, fire, and nether without any issues, but Aether said I needed to be attuned. Does that mean that all of those are in the same school? I would assume wind fire water earth are all just "school of elemental magic", would nether count for that too?
Having gotten Metatron at high affection, it's amazing at seeing her transform. Wondering if I get Aspraia to high affection will she transform similarity? Seeing Metatron smile was really nice, and it's interesting seeing how she's evolving with both Ashley and Sarah. Still think if there's another race war it'll be because Ashley pranked Metatron too many times. I'm not sure who has less self-perservation, Sam or Ashley. Also, and I can't stress this enough, seeing all the friends evolve has been really wonderful. Finding out WHY Sam and Celica dislike each other, Celica's motivations in general, Metatron slowly understanding emotions and her attachment to Sarah and MAYBE Ashley, it is really well done. Both trust and affection dialogues are really fun to read!