Dayne Crist was a head case, and he panics in the pocket when pressured. Kizer had a good year and left early against advice of the staff. These are the only higher tier QB talents that we have had under Kelly which is ridiculous for a place like Notre Dame.
Recruiting has been sorely lacking for sure. Perhaps development is an issue as well, but the sample size is small, and there is the notable exception of Ian Book who had marginal talent but was coached to the top of his ceiling.
Our present QB coach has only worked with Book which was a positive result given his physical talent. We need a larger sample size of actual High Tier 1 QB's to know.