In the past, Korg hasn't talked much about new arrangers until it's time for them to be shipped.
Yamaha leaks stuff months ahead of time.
Roland apparently is out of the arranger business, except for low end.
Ketron releases them unfinished and then tries to complete them after customers test them.
Of course all of them will initially have "bugs" to some extent. Korg seems to be particularly responsive to addressing them as soon as they are reported and verified.

Yamaha the least buggy when a new model is released, I believe.