Level 50+? That's a ton of grinding. I beat the game quite easily at level 37. You got to love the RNG on the encounters, sometimes going 3 steps and battle time, other times going 40+ steps with no battles. Overall a decent game, the crafting was well done, but it really did make the game VERY easy in the mid-game part. (Tactics is very OP).
Found another bug! When you reach the town of Kalbany and the events in the camp north of it, the storyline suggests you go to the canyon pass back to Ratirsh (hope I spelled that right) and do a pincer attack on the fort. I found that you can completely ignore that and go to the mines south of Kalbany and the story continues anyway :)
I hit an interesting bug in this game too. The part right after the 2 girls join the group, I went up to the ruined keep and got into the boss fight in the dungeon of the keep. I assume one isn't supposed to be able to win that fight, but I did. Got no xp or tales for it, which was disappointing. Even worse, the scene before the fight replayed afterward, and it put me right back in the battle :(