EDIT with following statement: I don't even play online. I am not an online player, but the following is an important "gameplay" mechanic that affects both online and offline basketball.
I am very reluctant to post the following because I actually wanted to create a completely separate thread that highlights two completely different matters after I've had time to dive into 2k18 retail. So you're kind of messing things up on my end. This was the one thing that I mentioned that I wanted to keep to myself until 2k18 was released. And I honestly truly believe that it would be the definitive solution to long passes only if 2k would take the plunge rather than stick with their current formula. I'm not going to have the visual aids to backup my current solution yet, but the gist of it consist of two things:
(1) Defenders have their backs turned during defensive transitions.
(2) Steal mechanics have a "telegraphic" component.
(Note: The following is not going to change with the retail product or the difficulty level. It's simply a legacy component that's a characteristic of 2k basketball.)
(1)
Defensive players have their back turned to the offense when running back on defense; 2k defensive players are programmed to run back to their "spot" on the floor first and foremost. Once they reach their "spots," then they will turn around and react defensively. Often time it becomes too late. This is easy to see from a 2k cam, less so from broadcast camera. This is a defensive awareness concern. When running back on defense, real NBA players actually jog backwards or tilt an angle visually picking up their assignments at the same time.
This gif includes three sequences. Notice in the first sequence how the offense essentially had a step up on the defense because the defenders still had their backs turned, allowing for an easy transition bucket. Well, he actually didn't make the basket, but he certainly could have. Observe the defenders as they transition back on defense. Note: There are moments when 2k has the proper back pedal animation and awareness animations though, but those are seldom.
NBA Players are often always visually engaged and defensively aware of their assignment when jogging/running back on defense. They are either back pedaling or jogging sideways, or at least have their heads focused.
(2)
Steal mechanics - a good percentage of steals in 2k consist of the ball thrown directly to the defender rather than defenders reacting and moving towards the passes. A clear example is the steal that happens @3:49 when Isaiah Thomas steals that long pass. Thomas essentially did not even have to move his feet. The pass was thrown directly at him.
Most of the steals that happen in 2k happens exactly like this where the defenders don't have to move their feet. The defenders are stationary and the ball just so happens to get thrown directly to them, or just so slightly in the direction of the defender that it makes steals/deflection look scripted. I hate using that word, but watch steals from all camera angle, the line of pass has a slight favoritism in the direction of the defender.