But this is a case where the option already existed, but was taken away. You can leave the toggle as it is, and just add the pre-existing keys back, right? At that point, you add "Strafe to left/right" as blank selections, for anyone that wants to use them to use. You don't even need to modify the existing toggle selections. And it's hardly overflowing, at least to my eyes. Also, I have issues using shift, and assigning an active key to my intended motions interferes with what I'm trying to do. I don't want it to always be on with the toggle, since it interferes with aiming without moving, and I don't want to have to hold down a key to make the repetitive motions, as that causes me much hand strain/confusion.
My point is, the old scheme existed, and was arbitrarily removed. Why not just return it, for those that were already using it? It wouldn't interfere with the current setup, as you could add the two key selections back, and just not assign them by default. Failing that, can you provide instructions on how to mod them back for those that are interested?