I agree in principle with most posters here. Ethan Johnson, Kapron Lewis-Moore, and Chancey Aghayere got offers ahead of Goebel with regards to ND, and all are viewed as more of the true "pass rusher".
The only way I could see it increasing ND's efforts with Goebel is if they want to try to wrap up DL recruiting before the fall, and concentrate on different positions for the fall/winter. Beyond Hunter and Goebel, the remaining DL prospects that ND has offered are either on record as waiting 'til at least the fall, or haven't given indication of when they'll pull the trigger.
We'll have to wait and see, since it is feasible that ND try to wrap up on their biggest hole on defense, but my gut feeling tells me they'll take a shot at some of their earlier offers if Hunter verbals. It probably bodes well for OSU's odds with Goebel, but you never know. You might also see Michigan step up their efforts for Goebel, if they miss on Hunter - who they viewed as a virtual lock.