No hitscan... Bullet drop is the thing that makes these snipers better than the others. Even if you make the scopes move around, hitscan ruins everything. Without hitscan. Without moving scopes. Leaving everything as it is makes the snipers harder to use. Trying to predict movement, compensating for bullet drop. I can do this just fine and kill people. And I know I'm not the best player out there. So other people can do it just fine.
In my opinion these rifles are perfect. The M21 is more of a combat-sniper rifle. Perfect when you have to take out several enemies at mid/long distances. The M700 is more for tactical snipers. Sneaking around the enemy and attack when they never expect it. And of course the Truvelo is for very long distances or vehicles.
Here a little story (I just felt like writing it :P):
One time I was hosting a fort war with these weapons in Dustlands Dark. After setting up a small base I instantly left my team to observe the emenies base. I sat down behind a little bush near their base and started to watch them trough my binoculars. My team always asked where I am :P Then the enemy attacked. Instantly I laid down to get a better sight on possible targets. But due to the distance and fog I was not able to do anything. After my team fought off the attack, they started a counter attack. Some missiles were fired, some of them missed. Everyone opened fire, and I spotted two enemies taking shelter behind their base. I pulled out my M700, aimed, patiently waiting for the right moment. Both stood still, I aimed a bit up due to the distance, and as soon as both stood still I fired. The bullet hit the right ones head, of course killing him. His teammate looked around, completely unaware as the second bullet hit his face...
Sure one of the more awesome moments in a battle.
After some time I got into a little fight, killed because I had the wrong "close-combat" weapon (SA80) with me :P