Simple math in numerical parameter fields
Designer could greatly benefit from allowing numerical parameter fields to be subject to simple math manipulation.
i.e. If someone wanted to change Perlin Noise 'Scale' from default 32 to some multiple, they could just type 32 * 4 and hit Enter instead of having to mentally calculate the answer and type 128.
Other applications have this feature such as Cinema 4D and Houdini. It allows the user to maintain their speed while working without being slowed down by simple math.