WB level, yes.
Any older, powerful guy that dies would be a WB level death, because it’s just sort of expected. The old guys get glorious last stands to clear the way for the young. If Shanks or Dragon or Garp died, it wouldn’t be overly unexpected, just like WB’s death wasn’t overly unexpected.
An Ace level death where it’s a young character with their full life to lead, I don’t think we’ll ever get that again.
A slight exception would be even an older Strawhat dying at the end, like Brook or Jinbei, would be close to an Ace level shock.