To the best of my knowledge this package has been around since 2013, see also:
https://www.youtube.com/watch?v=tFy3kIYJ4BUIt was first offered as an add-on for existing Korg models but somehow ran counter to the interests of Korg itself and I don't think many were sold. Then they decided to change course and went into a kind of joint venture with the Medeli keyboard company using the hardware of their Medeli A800 model to house this package, at least I presume it is virtually the same packaage. It is now known as the Max Live. Apparently sales did not do well ( if they ever got going at all) and now there is this renewed PA offer. Other than their demos etc. which you can all hear for yourselves I cannot judge their software/sounds but I think it pretty farfetchec that a PA600 owner, let alone a PA3X owner would oust all of his sounds etc. to be replaced by the Deebach package. As mentioned here, if it were an add-on and considerable less expensive it might be a viable proposition, as it stands it is doomed for failure imho. I know those who created this software have gone a long and winding road but it could well turn into a dead end..............
regards
John