PISTBOT & PISTBOT autos shotgun optics have been removed.
M249 optics on RAMBO and RAMBO Recoiless have been removed.
There is now an elite and hardcore version for RAMBO and RAMBO RECOILESS theaters. They are basically the same thing as the previous except that Insurgent loadouts are based on either the elite or hardcore coop loadouts.
Hardcore enemies should be harder since they have heavier armor than default.
Elite enemies should be easier since they have lesser armor than default.
Check out the theaters here.