I don’t think Harvey misjudged the position.
First, he was half of length of the car in front. His rear tyre was behind front one of Sainz. Racers should be able to recognize such situations.
Second, look at replay. There were two moves. First he turn to the right, getting right next to Sainz. After he didn’t move Harvey decided to push once more and cut in front of him.
In my view it was deliberate intimidation, an attempt to put the opponent into worse position. To force him to move next to the grass and get off accelerator. And i think he should have get the message after Sainz didn’t move the first time. He misjudged not position but the opponent’s actions.
Yes, may be ban would be too harsh. But giving 10 place penalty that results in loss of 5 places makes even less sense than that to me. And again, this is lower formulas. These people should be taught the limits or we will see next Canamasas and Maldonado (and in some way Grosjean) later.
At least i hope that Harvey got his lesson. And that he’ll have a look at his actions and won’t repeat his mistake. His apologetic reaction suggest that but only time will tell for sure.