The second the Scorchers DLC message window opened on Steam I already had my credit card out before the screen finished....lol
So the Scorchers Threat:
After having finished the DLC and perusing my new apartment with the trophy room (and the bimbo hot chick....wooot), I also immediately noticed a subtle change in the game.
The first scenario run I did was the Northern Sewers.
It appears (to me anyhoo) that there has been an increase in the numbers of mutants swarming you, as well as an upward nudge of their AI.
I also next ran the Plateau & Kvasir's Sewers and it became OBVIOUS they did something to the game.
I would suspect all the whining over Nightmare mode being No-So-Nightmare mode must have prompted them to juggle the numbers (in the program).
Also for those that haven't found out by now, the rocket launcher has been removed from Kvasir's Sewer after the addition of the Scorchers.
With THAT being said - they obviously can make updated changes to the current game which means there may well be other modifications throughout.
Good luck guys and happy hunting.
I will be continuing today through the remainder of the game to see if I can detect any other modifications to the NPCs and whatnots.
I would suggest you other die-hard RAGE fans do the same.
Cheers all