So basically in GTA3,GTA SAN,Gta 4 and GTA 5, A mechanic was added known as COMBAT ROLL. It got two options, roll left or roll right during action, a beautiful combat mechanic. It's really good in GTA 5 online (Vanilla) there is no issues with player A and Player B shooting at each other.
But here is the issue with Rage:MP. It was NOT built to support stuff like that. So when Player A is combat rolling left and right and Player B shooting at him it will be almost impossible to hit player A most of the times. I've TESTED it, and it will ALWAYS depends on Player A connection and Player B connection. Player A got 80 ping and player B got 50 ping, when Player A fire at Player B and does Combat-Roll left and right the Player B will keep seeing Player A in the original spot for almost 1 sec.
You can test it out, Let your friend do a Combat-roll Left or right, you will see him/her got a delay respond between you and your friend. So next time you see a PLAYER standing in point A and you keep shooting and suddenly he quick spin to point B it's all because of the ping.
SO high ping player got advantage over you when she/he does COMBAT-ROLL and If you got HIGH ping the LOW ping player got advantage over you. This is not just my opinion I've TESTED it and I was shocked that COMBAT-ROLL is not punishable by the community.