Use the Interpolation Patch to give your controls different curves.
The key is to right-click the Patch, and set the Timebase to ‘External’.
Then, use a Splitter with a range of 0.0 to 1.0 connected to the Patch Time in port. You can then set the Start and End values to anything you like to scale the output. You can even set the Start value to a number greater than the End value, to reverse the action of the slider.
You’ll need to set the Duration to 2 also, or you’ll find that you’re not able to use the complete range of the control.