A list of things that come to my mind after some thinking.

1) Still the pitchtracker/pitch demodulator, preferably with a range switch.
2) VOSIM oscillator, the Keagi/Tempelaars design.
3) A tendency mask generator. another design from the sonology studios. Easily explained
this is 'random cv between a maximum and a minimum value'
This is nice probably possible as an extension of the a172 max/min. An idea from the
workmethods of the german composer G.M. Koenig (Stockhausen's assistant on a.o.
'Kontakte').

I could elaborate more on these if you guys are interested.

Greetings,

Ernst