It's actually been in the game more of less from the beginning, and it's been discussed (and for the most part objected to, with a few staunch supporters) quite a bit. The unfortunate news is that Larian's official word on this right now is that it's deliberate and working as intended, however I would encourage anyone who disagrees with the implementation to submit their own direct feedback reports saying so and seeking a proper implementation of the rules; as long as it gets enough attention and people asking for the actual 5e version of the rules here, there's a possibility of it being changed.
