Valkyria Chronicles 1 had perma-death too, but it was pretty easy to avoid. Even if your character died on the field you had three turns to recover the body with any other character.
That's the thing, it's easy to avoid because you're given a second chance.
In Fire Emblem? Tough shit, when that HP bar hits 0 that ass is on the grass, and the difficulty will make sure that happens.
That's what I'm talking about.