Hi Rainer
 > Sometimes you want a sound to have some 'basic' modulation
 > of f.e. the DCO, which you want to be able to intensify with the mod
 > wheel.
That is an valid argument.
 To answer generally:
 It is not yet decided finally, what will be placed in the patch
 parameters and what in the functions.
 Also we have a lot of free storage spots in the "Tape"+"Bank-X" area. So
 there is no problem to establish again Tape-C and Tape-D as further
 patch parameters.
 Also I could imagine something like the TX7 and later Yamaha Synths had:
 16 function settings and in the patch one parameter, which selects the
 function setting.
 This is how I suggested it already for the pattern mode.
 Florian