Lets start with this:
1. Russian Marines:
They should be wearing the 'ODKB' pattern and not MARPAT, with this pattern provided by me being closer to the actual pattern than what they are currently using (yes I checked, the colors are correct)

Also why do they have no Patches?
2. British Forces:
On Forest maps they are wearing Woodland DPM, this shouldn't be possible in 2011 as MPT completely phased out DPM in frontline units, meanwhile the pattern as is seems to be scaled two times to small
3. Army Forces:
Same as with British Forces, since 2010 forces deployed to Afghanistan have been issued Multicam Uniforms dubbed by the U.S. Army officially as the 'Operation Enduring Freedom Pattern', with units having a mix match of ACU and Multicam like the transition between M83 and ACU, yet they still have full ACU uniforms, though this entire statement would be made redundant in 2 years when the Army finally adopts new camouflage patterns

Though Russian and American forces would have to make new skins made, in the case of British forces it's just a case of redundancy and can be easily fixed


