The overly simple answer is never. If you bulk age long enough there will not be a problem with fuzziness. It will escape on it's own without the bruising action of degbutting. But then there are times when it is useful. Some of my wines are better very young. In those cases I degas before bottling.
In your case, however, I wonder if it is an incomplete MLF. Red wine usually ferments out pretty quick and 6 months bulk aging should be enough to eliminate the CO2. But you are doing MLF after fermentation. It may take longer to eliminate the CO2 from it as it will not finish as long. You may need 6 months after MLF is completely finished. I suspect the problem would go away if you gave it another 4-6 months.
But then if you really want to put it in bottle at the time you are, then sounds like you need to degas and before bottling is the time to do it. You can test to see if it needs degbutting. Just put it you a bucket and stir it hard for a few seconds. If it foams, it needs it.
Ray
