Won't happen the guy from Yo-Kai wanted it to be hard/time consuming to get all the weapons and 2nd mount and is good friends with Yoshi.

It is about a 30% drop rate, people are averaging 800 fates to get them all. Took me 720 fates for them all.

If they did buff it now all those who have completed it already would complain how it is unfair to change it midway through the event.