One of the main reasons for all those stuffed runs and no gains was Haskins inability to run as well. With JT, a minimum of one, if not two defenders would completely focus on JT, even if he didn’t have the ball. They had to, so he couldn’t burn them. This opened up more running lates for Weber and Dobbins.
But with Haskins, you often saw defenders not even consider him. They would go straight to the back, and in the rare occasion that Haskins would keep, he was slow enough that they could recover. Being able to devote another guy or two to stopping a back will lead to many more stuffed runs.
For every thing Haskins brought to our offense as a passer (and it was a ton), he hurt our offense from a running stand point. That’s why as Jake pointed out, even though Haskins was setting records all over the place, our offense in 2018 was barely better than it was in 2017.