Say no more. Because there is nothing more to be said after reading this article, which confirms my own experimentations with closed faced swings.
If you read with a careful eye and truly absorb what is being said in the highly detailed 7 part blog on "A Roadmap to a Hall-of-Fame Forehand", you will understand why these types of forehands dominate the current men's world tour. You will also be able to hit your own version of this forehand if you keep experimenting.
Tennis will continue to change in this direction, at least, the ones that want to win consistently.