fab_lorenzi, the woman behind the counter in Winhill inn is one of the card players who are very stingy with playing rare cards. Last time I played her, it took me 8-9 games until she finally used the Kiros card. There's probably a variable that controls a card player's willingness to play rare cards. I would change it for this player, as she also plays so damn well. Have to investigate that. For now, I can only advise to keep trying.
goodmorninpluto, thank you for your impressions. Diablos counters Demi no matter the circumstances. The only condition is that you have to cast Demi from own stock - he won't do it when using Draw Cast. He can beat your party with his physical attack and the Pain spell that does Poison damage now, which you can't protect very well against when attempting the battle right away. Maybe you just got lucky and he used Gravija most of the time. Anyway, the Diablos battle rather serves the purpose of a Limit Break showcase than a real challenge, and the statuses from Pain only help with that. I wanted him to be beatable right away on purpose, so the player can get a third HP and Mag-J soon, which is important especially for the Centra Excavation site.
As for Gerogero, Esuna in his Draw list was kept for safety reasons, i.e. if the player boarded the train in the worst situation possible (barely any spells, no Phoenix Downs left etc), as you can't do anything to improve your characters' stats or buy items once inside. Maybe I would remove it if I managed to add in a shop there. As for Gerogero's attacks, I'm doing adjustments to bosses at the moment anyway, so expect some changes to Gerogero too.