Yes and no.
He chose to keep his feet on the ground.
The extreme limit acceptable to the Cultivation Path Ancestor should be the tribulation required for his ascension to sainthood.
The extreme limit acceptable to the Saints would likely be the tribulation of him surpassing all other experts beneath sainthood.
The permissions derived from the Devil Ancestor are sufficient to achieve this level.
Beyond that, he'd need to find a new approach.
Or, when the time comes, adjust plans according to the situation.
As for now...
Since the Cultivation Path Ancestor had explained so much, it would be utterly unreasonable for him not to agree.
After all, the Cultivation Path Ancestor was not the Holy Mother Primordial Monarch.
When Ji Changsheng confirmed he couldn't defeat his opponent, not even his own mother, he switched his perspective and felt the Ancestor's favor toward him.
Was this making things difficult for him?
It was clearly a sign of trust and value.
