The balance in Ys has always been very skewed towards player level. If you're two levels below the target level, bosses will feel like an insane grind. If you're one level below, it's fairly challenging. If you're at the target level it's supposed to feel "just right", and if you're overleveled by even a single level, the fights can turn into total jokes. I kinda like that balance. Ys7 definitely pumped up the HP for bosses though, so even if you're strong and the fight is a bit of a joke, it's more time consuming. Another strike against it!