I quite agree. Although I'll probably get slagged-off for even mentioning the subject, this style of marking and camouflage is often regarded as being the "generic" scheme that most people associate with the Vulcan, and I hope that XH558 is repainted in this style, sooner or later.
I think it would also be the most appropriate choice as it covers the combined-wing era when all the Vulcans looked virtually identical, so nobody could be accused of any unit favouritism! Besides, a Vulcan doesn't really look like a Vulcan without that big black radome, now does it?!