This is what turns a lot of people off: it isn't suggested, according to the words of the article:

Dr Obura stressed we had not yet gone past the upper limit of the tipping point threshold for coral reefs, which is 1.5C.

"Unless the right actions are taken globally, urgently, on climate drivers ... the increasing climate pressure means that all reef regions will approach their tipping points, and some may cross them."

It's pretty easy to read that quote as "not yet".