The KORG PA-80 update which was released this week includes a host of minor improvements but to me it is once more vastly disappointing. On some of the main new issues I will include here some bits and pieces from the new manual:
ON SAMPLING:

THE SAMPLING MODE
A series of Sampling functions has been added to the Program
mode. This Sampling feature is designed to edit audio
loops and generate single percussive samples, to be used as
the rhythm track of a Style or a Backing Sequence. It is not to
be considered as the full-featured sampling feature of a dedicated
sampler.
After sampling or loading an audio groove, you can slice it
into separate percussive samples, and save the individual
samples to a new Program. A MIDI Groove file will also be
saved, to let you load the original pattern as MIDI data for
the percussive track of a Style.
The Program based on the sliced samples has to be assigned
to the Percussion track of a Style

ON THE FILL INS. (currently 2, and that is going to remain SO !!!!)


FILL TO VARIATION 1, 2, 3, 4
The new “Fill to Variation” functions have been added to the
Fill parameters. See “Page 20 - StyCtl: Drums”.
Fill1/2
You may assign four new functions to the FILL 1 and FILL 2
buttons. “Fill to Variation” (->1, ->2, ->3, ->4) automatically
selects one of the four available Style Variations at the end of
the fill.

NO DYNAMIC ARRANGER, not by far !!!!

Furthermore they have now added Touch Sensitivity to the most absurd function, e.g. the arranger will start depending on the touch sensitivity , but there is NO
touch sensitivity on ANY of the Acc. tracks,
(= no DYNAMIC ARRANGER therfore).
In one of my comments on the new and cheaper Yamaha PSR2000 I have pointed out on several occasions that the 2000 does include a Dynamic Arranger. It would be so easy for KORG and so valuable and musically expressive for the musician to include this that I remain completely baffled regarding this aspect.
I hope they will at least include this feature in the next minor update.............

john.