Hello again, finished the story! Finale was excellent, will gather thoughts on the whole game at some point. Found some more bugs along the way, though.
First, all the shops and facilities in Call aside from the save book appear to not work. Second, when promoting to 5th tier, the currently equipped Evoker summon appears to get stuck in place. It's specifically the summoning ability itself that gets stuck, the associated attack spells and buff still change to match the equipped spirit but the summon spell remains whatever it was when changing classes regardless of equipment, I've tested this with both Union and Artur. Also Clearwell still appears to be a single-time healing spell and not a regeneration effect, not sure what's going on there.
And finally, a number of mapping oddities: https://imgur.com/a/mqp6sUB