I was just disappointed that they didn’t actually call him “TR-8R.”
Also in this case I wouldn’t say that it killed any “mystique.” He’s not some weird cantina alien he’s some guy who clearly knows Finn, and who has some pretty unusual training. It doesn’t really matter, not for the sake of the film anyway, but for those who do like to have backstories, now they have one. One that actually makes some sense, unlike certain other EU backstories
I also love how the fans have named Daniel Craig’s stormtrooper “JB-007.”
I’m relieved they didn’t call him that. Talk about lame fan service. He was obviously part of the same crew that Finn was, so the FN indication in the name is logical.
As for Skippy the Jedi Droid, he was never and has never been considered canon. He was the subject of a comic short story in Star Wars Tales. A title that from its inception was a collection of non-canon stories.