Right, if you were level 61+ they would start to drop the legendary COMs (and a chance for pearls that increased as your OP level increased. Pearls. Hmmm. Perhaps a future addition to BL3 as well? )
Before that level, they still had a pool (which persists into UVHM/OP) that included the Bunny, WTF, Cracked Sash, and skins for the characters. You know, I honestly can’t remember if one of those would be a guaranteed drop, say in NVHM. But I do remember my first encounter with a chubby in BL2 was in NVHM and it dropped a Bunny, which I promptly killed myself with.
Along these lines, dropping legendary COMs in BL3 normal mode would probably be “too soon”. My first encounter with a chubby in BL3 was early on, during the hot dog chef’s side mission. I don’t think I was even capable of equipping a COM at that point.