It's great news but It will take a long time.

First, all the detailed legal paperwork has to be filed and some details could hit a snag.Given the history with QR, the repair process won't start until the legal situation is crystal clear.
Then the birds have to be recommissioned after long storage and probably flown to some Airbus base, where the "improvements" will be implemented. QR will probably wait for the result on a couple of birds to give the green light on the others.Then Airbus has to schedule those on top of the existing work. It could take more than a year to be completed.
I hope that I am wrong.