On the old ideas and suggestions trend I proposed some dual-sword weapons for an "Urban Ninja-like" perk.
1st Was an add-on to the perk knife that gives you an extra knife in you left hand for better attacks and damage reduction(on blocking) for just 1 weight
2nd Was buying a second Katana and dual wielding them(like the handguns). would require changes to the Katana's current weight and/or upgrading
3rd Was a tier 4-5 weapon made using the Gorefiend's blades, with a style that is inspired by how they attack. These always come in a set, not individually
Are these the kinda dual swords you were thinking about? I would like to see dual blades at some point too, but mostly for a bladed melee perk like Urban Ninja