"Another change to the polymer grip frame includes an 18-degree grip angle, added by the company after ergonomic studies concluded that this angle provided a natural aiming point for most shooters."
The way the this is worded in the linked article,it appears that S&& changed the grip angle from the 1.0 Shield. Yet this is the first I have read about it, and it looks the same as the 1.0.
Of all the M&P pistols, the Shield is the one that I am least inclined to go to a 2.0 version. If I didn't own a Shield and was in the market, then I'd most likely go for the 2.0 version. But as it is, my 1.0 Shields are not going to be "up graded to the 2.0" anytime soon.