Been like that since at least the end of 2013, IIRC. However, they still do not state that directive any where on their website, and it still refers simply to a change of colour rather than any additional info about wrapping. Given that, I'm not sure I'd bother as unless it's actually written down somewhere that you could reasonably be expected to find it, or they actually tell you directly then how are you supposed to know? This would also be backed up in law somewhere, and I'm not aware of any cases where someone has been prosecuted for not telling the DVLA about an all over wrap.
The fact the DVLA don't know their arse from their elbow with regards to this doesn't surprise me at all! Would I bother telling them? Nope, I wouldn't. It's not a colour change, it's a sticker. A f*cking big sticker, but a sticker nonetheless.