COR: Death Penalty and especially Armageddon absolutely destroy Annihilator anyways, and COR's lack of KC access or Silver Bullet access really hurts their ability to perform the way Anni-RNGs do. There is no point giving them this weapon.

PUP: Spharai are weapons with a Counter Enhancement. This would be rather silly to give to a job with no native Counter trait. Verethragna and Kenkonken also destroy Spharai, so this is a waste of time.

BLU: Obviously the only job out of all 5 of the Post-ToAU jobs you are asking about, and Excalibur is still crap compared to Tizona and especially Almace. Excal has always been a fairly weak weapon, its only saving grace being its Additional Effect which is still mostly useless now that sword-wielders are not so weak as to gain the majority of their damage from Max HP procs.

DNC: This is probably the only Post-ToAU job that could actually use their Relic. Mandau is definitely still competitive these days, especially on DNC which can't force Rudra's Storm to crit. I have no idea how Terpsichore stands up though.

SCH: Claustrum wat?

Offhand a DA+ Khanda or STR Shamshir with an Almace and you'll get better/comparable results versus offhanding an Excalibur for a significantly smaller time contribution.