I've always felt that blue blended in a little more in the previous games (not enough to really make a difference though), but it's such a light shade of blue this time, that I can't say it does anymore.
Camouflage aside, I really wish that they would always make your team appear blue to you with the enemy team appearing red. Sometimes the constant switching back and forth can get a little confusing. It would be so much simpler if your friends were always blue, while the hostiles were always red, as red is commonly associated with hostiles in video games. Of course this could no longer be the case in matches consisting of three or more teams however.