Can't wait for the details, how it will exactly get played out that joker Card of a Feature...
I hope they have written up some of my suggestions to use it as a method to give the game more longevity and reasons to play the game through multiple times, as in making NG+ a rewarding feeling each time you do a playthrough, while still being not something that forces people to do it, which have no plans on playing the game through multiple times and giving still peopel who like to go for it the OPTIONALITY to learn and master everythign with Geralt to receive more build diversity over the course of the multiple playthroughs over time, or ignore that, if your opinion is, that Geralt should not learn more in NG+ to keep simply both sides happy, so that everyone can play the game as he/she likes