I hesitate to recommend the revival of the custom, because I've known a few people who'd use the occasion for a final nasty jab. We don't have the infrastructure of expectations to curb abuses.
Nevertheless I like the idea of having a get-together for a final blessing. It could be a hard to muster the energy to say much, but that's one reason we have microphones. And it could take a long time, with plenty of rests, to talk to everyone. And there could be expectations that everybody get comparable amounts of face time, which isn't remotely reasonable but... And I can imagine expectations that everybody use insincere happy talk. And things get amusing if the dying person recovers to live a few more years (my late mother-in-law was very close to death several times in the years before she died).
Still, if the opportunity is there, it seems a shame not to try.
On a related note, I hope you read David Warren's column about his mother's death.