Things like not-75 BCNMs that are the sole source of Refresh people aren't doing much anymore, so I've been waiting two days to snag myself a Refresh scroll to be able to continue leveling Red Mage to 49. I could try to put together a BCNM40 run myself, but people seem to be "Kraken Club onry" and only spam that shitty BCNM60. (I even checked to see if anyone reported getting a Refresh scroll from the keys from the addon scenarios, but alas none have been reported.)
Besides level capped BCNMs there's also things that only come from the Ashu Talif Assault missions. The PUP Automaton attachments I don't have are almost entirely from that BCNM. They're all in the 1,000,000 gil price range and super rare. Several are really useful too. (Haste+%, Magic Acc+X(or+%?), less overloads, etc.) There's Rare/Ex Haste+3% pants from it too that are quite nice for the jobs left off Byakko's/Homam.
Stuff like this Square-Enix should really address as the game is getting older.
When the level cap is 80 for three or four months the Octave Club is going to be on par with the Kraken. Levels 88 and 96 too, but those aren't final caps. Just something random I thought of and wanted to mention. (I don't have either club or a desire to camp them/spam that BCNM.)