Years ago, when science was just discovering wildlife, it was vogue to name everything as a species or subspecies. There were beetles that got different names proposed because they had been collected at different stops along the same rail route. Kind of a Victorian thing. Collectors like the idea that there are lots of legitimately different species, since it means they don't, in fact, have five copies of the same thing in their collection. You see this real bad in insect collecting. I have never been much in the camp of the subspecies crowd, and I've bred over a hundred pyros, so I know that any pairing is capable of producing any color phase. I thought infralabialis might stand, because it used a physiological trait rather than a color phase, but I don't know how extensive the type series is--if it's based on one or a very few specimens, and especially if no others have been found since, then the infralabialis character was most likely individual variation.
For the purposes of discussion within the hobby, I adopted the language used by the bug collectors, and call the various synonomized subspecies "forms". Thus, (yes, I did just use the word "thus" in a sentence) L. p. woodini would be referred to as L. pyromelana f. (for "form) woodini, or simply the woodini form. "Phase'" is currently in common use, and that's fine, too.
As taxonomy becomes more sophisticated, and as new generations of taxonomists are granted their PhDs (and arrive at their first posts full of the need to quickly develop a rep in their field--a factor in the momentum of revisionist taxonomy), we'll see many taxa in a new light. It's not just the new crop of post-docs, of course--another factor is that as a generation of scholars matures, they become more insightful, and their experience starts to pay off with new and better understandings. DNA studies can unravel relationships, long-ignored taxa may come under fresh scrutiny as the more popular taxa are disposed of and scholars need to dig farther into left field to find ground that's not already completely plowed, and we can expect many revisions, some of which will stand, and some of which will not.