NotFormer:
The change in 2005 was probably to deflect a possible rise in defamation suits against elders and possibly the GB as heading up the whole defamatory machine.
Saying someone ‘has been disfellowshipped’ isn’t more defamatory than saying ‘no longer one of jehovah’s witnesses’, and both are food for the rumour mill. The change was more likely to obfuscate whether a person was disfellowshipped, decided to disassociate, or was told they had ‘disassociated by their actions’. If anything, it may be more defamatory if someone leaves because they know it’s not ‘the truth’ but people decide the person is a pedophile or something instead.