23D Feature for reversing transfer to subledger

It has been announced that in 23D update we will be provided with the option to reverse the transfer to subledger process.

Do anyone have any guidance for the feature and are you able to answer the following

1. Can it only be used where an entire payroll month has been processed by mistake? Can a reversal be run and then a correction of the same month?

2. Does the reversal correct the costing and balances? How does this apply to prev years?

3. In general what are the capabilities and limitations of this feature and when should it NOT be used?