Well if you pre order the new NI Komplete Kontrol 88 you will see out of stock, that show that it is a well sort after keyboard controller and I don't think the user will be using another keyboard for their music once they get hold of the K K 88 and it has lite keys but many have said very nice to play and keys have a nice feel.
https://www.native-instruments.com/en/products/komplete/keyboards/komplete-kontrol-s49-s61/pricing/
I think you might be confused, there isn't a new Kontrol 88 keyboard. Only the 49 and 61 key versions have been upgraded to Mk2. The 88 Mk2 is probably coming next year