Shapechange spell, is your characters proficiency bonus a class feature?

@mikemearls @JeremyECrawford @ChrisPerkinsDnD @SageAdviceDnD for the purposes of the Shapechange spell, is your characters proficiency bonus a class feature? #DnD #SageAdvice #SageAdviceDnD

— illustro (@illustromancer) April 16, 2018

While you're under the effect of the shapechange spell, you use your proficiencies, including your proficiency bonus, except when the stat block of the new form has a modifier (proficiency bonus + other modifiers) that's higher for a proficiency you have. #DnD https://t.co/LOZpohZsW7

— Jeremy Crawford (@JeremyECrawford) April 16, 2018