I think your question may have gotten lost among all the posts about the WDW release.
First I should clarify that I have absolutely no insider info, but I'll share my thoughts anyway. The older finish seems to be fine on anything with a colored background, so it works great on your black bag.
Bags in that finish with a white or cream background have been known to have problems with yellowing though. It's not a given, I have a white
DCL tote that still looks great, but my WDW bucket bag definitely has a yellow tinge to it now. The yellowing doesn't bother me quite as much on the anniversary bags since they have an antique feel anyway, and I got mine for a great price and I love the placement, so I'm keeping it. But it is incredibly disappointing for handbags at this price point to have those kinds of quality issues.
I think many of us are hoping the new shinier finish will solve the yellowing problem. I don't know that it's been around long enough to say for sure though.
Hope that helps.