Personally, an auto-aim option would basically be a hack, since it's exactly the ability to aim (as well as position) that distinguishes good players from less experienced ones. Auto-lock would make it easier to blast targets with high alphas, and in my humble opinion, it would take away from the game..
Anyone who's ever played EA sports F1 game or any racing game, knows how much of the "realism" you loose if you engage auto-breaking or traction control.. This would kinda feel like that..
Although I understand the surprisingly good-natured drive behind the idea, I think it would kinda "dumb down" or "water down" the game.
Auto-aim / auto-lead where you just have to stand in front of the target and push a button, that would make things too easy for direct fire weapons, especially weapons like Gauss or PPCs..
I would not, however, mind a module/skill-like thing that would be like Artemis was in previous MW games, where it allowed you to target a specific component.
I would also be ok with just a motion indicator like in Star Citizen, or other space-sim games, which is auto-lead, but without lock.. It just shows you where the target is gonna be for it's current speed.
Although, knowing PGI.. such things would probably wreak havoc with hitreg..