This weapon had been surprising in a lot of ways. It's not until I actually tried that makes me realize multiple fight let me virtually pump temporary accuracy (commits, Physical Training, Hard Knocks, etc.) once and get more benefit compared to attacking separately and having to pump twice to hit both. It is more test compression rather than action compression.
In effect, investigators with low like 1 or 2 gets more benefit, since normally you would require massive pumps to land a single hit. I am currently running Wendy with this plus the Jury-Rig, surprisingly bringing her 1 to 5. Suddenly, I am very willing to pump 1 or 2 resources with the good old Hard Knocks to ensure the hit. Crafty in the same package is an excellent temporary pump card to support a play like this.
At 2 it is quite flexible how you use that extra action in a test-less manner. Other than moving in and swing like you are in Monster Hunter, I had some cool plays like keep evading on the last action for long fight with the big guy, or for high enemies, having other investigator take engagement away to tank damages each round and then engage back on my first action to prevent smashing my friend into pulp.