After I posted above, I went and read a few reviews of the COD: Ghost on PC. I found this excerpt from PC Gamer that sums up what I was saying in my above post:
"I don’t doubt that every gun, perk, and killstreak reward in Ghosts was implemented and tweaked with a fine brush, but painting in every individual eyelash of the Mona Lisa wouldn’t make it a better painting. That’s what’s been happening to Call of Duty: Modern Warfare since 2007—little bits have been scraped off and painted over again and again. With a broader brush, Activision and its studios might stop noodling around in the corners of Modern Warfare’s greatness and paint something actually modern."