I'm looking at some of the weapons in Warframe I haven't used in a few years now, and I see Dual Daggers are really notably screwed. No range, slow attack speed, some ANCIENT stances (and a tolerable modern one), and nothing to make them stand out against Fist, Sparring, and/or Claw weapons in a favorable manner ( because, TRUST ME, they stand out in a VERY negative way).
I'm not saying Dual Daggers are utterly unusable, just that they're largely useless past level 30ish. The Sai daggers