Indeed, this is a feature planned in an extension. It's called Monkey Grip, and it allows anyone with a state, or a tag on their actor, or class to wield a weapon that is normally two-handed in only one hand, allowing an offhand weapon (which could also be two handed), or a heavy shield to be wielded normally.
This extension was actually part of an early version of the base plugin, but I had to remove it before releasing the update it was in, because the menu extension plugin was broken beyond fixing that the time. I've been slowly working on trying to fix it, and get it out there for most of the year now, but it's not exactly a high priority right now. Rest assured, though, that it is being worked on, as I also want it working in my own project. :)