Who is better thank Kizer since Clausen. The options are Crist, Rees, Hendrix, Golson, and Zaire...I don't think its a stretch to say the DK was the best of that bunch (none of the others were drafted, and like Clausen DK will likely be no later than 2nd round)
Quinn was better than either Kizer or Clausen....and he was the best ND QB since Mirer.
As far as how Kizer played in clutch situations...See VA, Temple and Stanford in 2015.
In 2016: Texas -had what should have been game-winning drive late in 4th before defense blew it; also had TD scoring drive in first overtime; MSU - led 3 straight scoring drives, including 2 in 4th quarter to get ND back in game after big deficit; Duke-as with Texas led what should have been game-winning scoring drive late in 4th only to have defense blow it again; Miami led game-winning scoring drive