The Pontifical Commission was never intended to deal with specific cases. It's meant to be a sort of think-tank, to advise the Pope on how to minimise the risks of clerical abuse.
The problem is with the CDF - i.e., its failure to respond to abuse victims.
And - in reply to your point about short working days - we do know that the CDF has very leisurely working practices - as is explained, for example, in Krzysztof Charamsa's book 'La Prima pietra' (2016). Charamsa explains: the very long coffee breaks; the half-day working routines (to allow the officials to hold down other posts - e.g., teaching posts in universities).