Thank you so much for your thoughtful feedback!
1. Growth Eggs only affect Weapon and Magic levels, not individual character EXP, which was only added in the newest version. I guess I should have accounted for this and been more specific in its description?
2. Yikes, glad you were able to escape. Tonberries also appear in the area outside that room, with the long bridge. You can summon them instantly with Noah's Lute.
3. Enemies guarding is kinda chaotic, I guess.
4. You probably need a higher Magic stat or level of Osmose. I honestly didn't use it much myself, so it could probably be optimized better.
5. Thanks for catching that. Reraise can be kind of buggy; it doesn't activate on allies sometimes, for example.
EDIT: I just saw your review, thank you so so much for your extremely kind words! :)