If ice cliffs in the Antarctic won't collapse catastrophically that decreases our estimate for how quickly the sea is likely to rise, which is certainly good news!
But we're still going to get some rise, and accurate elevation modeling is important for figuring out what effects that's likely to have.
Roughly, you can think of these as two disconnected efforts: get the best estimate you can of the distribution of possible future sea levels, and get the best estimate you can of the impact of different sea levels on humanity. Your link is the former, this link is the latter.
But we're still going to get some rise, and accurate elevation modeling is important for figuring out what effects that's likely to have.
Roughly, you can think of these as two disconnected efforts: get the best estimate you can of the distribution of possible future sea levels, and get the best estimate you can of the impact of different sea levels on humanity. Your link is the former, this link is the latter.