Just another data point...
My last Credit Card application was in June 2017 (yes, slack, I know...).
My last 11 month’s credit scores (according to CreditSavvy) were all 724.
Then this month, following the introduction of the new CCR system, my score dropped to 565.
As far as I can see, the only change to the data they have is the addition of payment information on one credit card account (which has been closed for about 18 months), which shows a credit limit of $zero and a Repayments On Time history of 100%.
I have a ‘Real Life’ 100% pay on time record, and significant assets & income.
I know that the rating agencies are trying to produce scores on the basis of information which is known to be incomplete. But when any rational assessment of my ‘Real, full fact’ financial history & situation would probably result in a credit score of 950+ Vs the current 565, the system looks to be a bit broken & unreliable.
/end of grizzle...