Steel pick isn't OP at all, as has been said it's balanced by range. Agi spamming helps some with that, but then you lose damage. It'll still be easy to dodge your best attack, the left swing.
Scimitar isn't OP either, it has three attack directions and mediocre damage. The feints can be a bit harder to read than NCS etc but that's the only reason it's viable at all, given that it has no thrust and less damage than many weapons.