Having exp and log response curves in addition to the current linear response curves could be very useful. Other curves, like "S", could be useful too. E.g. to have more control in the middle of the fader.
Thanks for your feedback, indeed, we though about giving control curves, that could be a good feature to implement, we will think about that :)
In case you are using Ableton, there is a "MPE Control" midi effect. See if that can help in the meantime. You should be able to control curve for all three aspects (pressure, slide and pitch)