So any feature that's not revolutionary, no matter if it wasn't completely necessary to the game in question from beginning (stash feature for example wasn't said to be DLC because many deemed it necessary), no matter how much effort is put into it (need to rebalance quests, monsters, items), is not worth praise for adding post-release for free, instead of attached to an expansion, or put its own price tag, or simply axed any initiative since the company already has your money. THEY COULD HAVE JUST NEVER DEDICATED ANY WORKFORCE TO MAKING IT, do you realize that?
Mate, you are not arguing this from the best angle here. The praise for NG+ does not exist in a vacuum. Having a big, costly game like this spit in the face of other AAA titles' monetization, is absolutely praiseworthy.