With expansion launches, literally hundreds of new items are added. They can't realistically list them all because of the amount of room that would take. As a result, I think they just collate the 3 into "New X has been added" to try and keep the patch notes readable for people, and simply stick with it for consistency's sake. I know if they went into that, I'd probably balk at the size of the patch notes (I struggled with reading the SB patch notes because of the sheer amount of stuff in it). Though the Eorzea Database, you can actually filter it by items added in the latest patch, ED being something SE made for FFXIV. And I believe that tells you crafting recipes, etc. Failing that, there's always XIVDB.