Rather than add specific items to specific content (which as a poster mentioned earlier, once people got those items, they'd become irrelevant again) they'd be better off adding a currency to all non-current content, and make all the new glamours etc bought with that currency.

It has several upsides
1) Specific items aren't paired to specific content, so you're not stuck doing a content you loathe because that's where the item you really want happened to end up
2) Gets people running any and all old content rather than just the couple places that had stuff added. Players can play whatever content they enjoy/miss
3) All content that becomes outdated in later patches automatically has reason to keep running it without them having to add in more new stuff
4) One consolidated place for them to add fun new things to the game that they might be holding back because they don't know where to fit it