Brilliant! That Debug option is awesome! It's exactly what I wanted! Now I can also make proper, small, precision cuts, or even make a pattern with the lines!
...God, this game is doing too good of a job in getting me excited about messed up features... :))
It's really cool as it is. It adds a lot of possibilities with the new ways you can use stuff (rotating the saw) and the ways the ragdoll works. That's probably why I'm a bit sad that it did not play around more with the possibilities the game itself creates and doesn't add anything new (except for, you know, that sword).
Ok, but I can "win" in .2 seconds by pressing 3 then clicking the forehead. I don't think the concept of "overpowered" can apply in this game, nor the concept of "skilled". Not to mention that you can't even see anything. If I click and drag, the sword just stays there spinning, and when I drop it teleports to the (previously unknown) position of my cursor. Now here's what's overpowered: the fact that I have no idea what's happening, to the extent where, when it works, what was supposed to be a small cut turns out to cut the entire room and everything in it because I have no idea how far my cursor went. Even with a real (difficult to use) sword at least I have the advantage of knowing where the sword is in real time. Not to mention that swinging something in a straight line and moving a mouse are different things.
You are right about the "unintuitive" and "not fun" parts... I would just have it be a point on the screen. When you press it, you define a straight line to wherever you move the cursor (sort of like planning the strike) and when you release the sword appears for a split second and cuts.
