I just took Rapture Pro for its first test drive.  No major problems encountered except one, which may very well be something I'm doing incorrectly.
 
I cannot get key follow to work for anything but the pitch tuning files, which is a whole different thing in any case.  For pan, for example, I can change KF to be an upward or downward diagonal line - no change in pan position as I move across the keyboard.  This is for a dead-simple one-element preset with nothing else going on.  Likewise, I cannot get it to work with filter cutoff, which was my biggest interest, nor could I get it to work with amplitude.
 
I don't believe one needs the LFO to be enabled for KF to kick in, but it doesn't work whether the LFO is or isn't enabled in any case.
 
Thoughts or suggestions?

Anyone?  Can someone either confirm that this is working for you or not working?  That would be most appreciated.
 
This modulation was easy to apply in the pre-Pro Rapture, and I cannot imagine why I'm having no results in Pro.

Seems to work for me.
In Modulation, I select PAN, enable the LFO/KEYB unit, then the curves for the right side (Keyboard) control the panning on the element.
 
 
 

arachnaut
Seems to work for me.

Hmmm ... I must be doing something wrong.  Thanks for checking on this.

Key follow works fine for me in standalone mode and when hosted by SONAR X2.  However, when hosted in Cubase 7.5 it is non-functional (except for pitch).