Hi,
version 2.3.1 is mainly a bug fix release. But I also contains some feature requests from users.
The only big new feature is a .svg loader. The SVG file format should finally offer a robust way to move spline data from Adobe Illustrator to Cheetah3D.
Now to your feature request. I think that feature is already there. You can bind the "Modifier On/Off" command to a hotkey. That allows you to disable the modifiers by a key stroke.
By,
Martin