Urgh...I hate ice block puzzles. I almost threw my Wiimote at the TV like you hear of those people doing because of the ones in Twilight Princess.
You serious about that? I though those were easy. I finished them in a few minutes no problem. They didn't even seem to get any harder. They certainly weren't the coloured block puzzles in OoSeasons/Age, let alone any of the puzzles in Lufia 2 type hard. Zelda has had harder puzzles than those Ice Block ones.
As for Etrian Odyssey except for final post game boss it isn't impossibly hard. It's for easier if you know what your doing. A Troubadour with Healing & Relaxing, a Dark Hunter with Drain, and throw in a Medic, you don't even need to touch Immunize intill post game content. Never mind a Hexer with HP Up & Revenge paired with a Troubadour and Stamina can be surprising effective. I did everything different when I played through it and still succeeded without my Medic and Protector knowing the game braking power skills Immunize and Anti/