I think the Retro actually got nerfed. I left the game for about a year, came back, played some multiplayer and then my Retro had a severe accuracy loss even at close range and didn't seem to do much damage to the shotgunners.
In any case, I used to get a lot of hate for using the Retro Lancer all the time. I didn't understand that hate in the least. It's a gun basically designed to murder players using shotguns. That's the point of the weapon. When the game first came out, I used it. Why? Gears 1 and Gears 2 were massive shotgun whore fests. So naturally, you use the Retro and rape noobs.
Then they get butthurt.
"It's worth remembering that all reviews are subjective personal opinions and if you personally enjoy the game, then they shouldn't get to you. Unless there's a dispicable nagging little doubt in the back of your mind that maybe you're not having as much fun as you've convinced yourself you're having. And won't go away no matter how many times you try to slap it away with weak excuses."