I watched the game a couple of times and focused on Mazi. First, I am pretty sure he had more snaps than Hankins in this game and I know some came early in the game so it is not like the Cowboys are afraid to put him on the field.
The Giants did double team him a bunch of times. Sometimes he stood his ground and sometimes he got turned. There were a couple of plays where he showed some quickness and got in the backfield. One play where he was one on one with the Giants LG and he shoved him aside pretty easily. He showed more in this game than he did in preseason, IMO. The Giants also double teamed Osa too and he didn't do much better against the double teams than Mazi.
Hankins was not in there much but when he was he showed how strong he can be. Mazi needs to learn from Hankins.
I remember when Derrick Brown was a rookie I watched him in a few games and he didn't do that much either. Jordan Davis was just so-so last year for the Eagles. I just think DTs take a year or two to reach their potential. We should look for signs of improvement from Mazi each week.