I must disagree. While you could potentially argue against Cyber Mission/Soul Eraser armors as Light tweaking the old parts (although I do not condone defining an armor by appearance rather than ability), Alia's recreation in X5 is by definition a separate piece of work from the original. Her armor is a lie.
That would only be a problem if the X6 version of the X5 Armor would have been the Fifth Armor. But as is, Alia's recreation lends its name from the armor it is based on, not from the number it itself is. As such, neither XC, nor XS, are counted as separate armors to this number; whether the recreation itself does is anyone's guess.
In all fairness, Vile's presence lends a lot of credit to that. And then of course there is Sigma, since virus or no virus he remains the cause of it all. One way or the other, the New Gens are bragging about something that first-generation Reploids did. They simply have a higher occurance of it.
From the viewpoint of the fans at that time, Vile from the very beginning was said to have a defect in the electronic brain. Likewise to Sigma turning evil by the Sigma Virus. Neither Vile, nor Sigma should have attributed to the widespread belief that all Reploids can become Maverick by their own accord. Somewhere along the line, the fan perception changed the original definition to one more revolving around free will, while it should be all about the defects. To me, the term "Irregular" captures that part of the meaning much more than "Maverick" does, and I can't imagine that such a change did not influence our perception of these concepts, irregardless of the meaning defined in the actual story being the same.
First of all, the fact that any Reploid, ever, has been deliberately created as an Irregular makes that statement outright false. There are organized, self-aware Irregulars/Mavericks and there are random, incoherent Irregulars/Mavericks. The terms MUST encompass both scenarios, not one or the other.
It should be entirely possible to create Reploids with defects. And even if they aren't defected, they are grouped among them because of affiliation. That is still not free will; that is being forced inside of the boundaries of the human government's favorite anti-Reploid label. A label the New Generation opposed with the very statement that they cannot become "irregulars" as they have absolute viral immunity.
by using the word "can't" and presenting your point as an absolute. By stating that it is not physically possible for one to choose to be Irregular (this incidentally makes Weil's taunting Zero in Z4 meaningless), one simply echoes the same debate that exists about humanity. The sentient being is seen as inherently good unless "flawed", by blueprint or by experience, resulting in evil.
I said "technically". Whether one can become an irregular by choice is even disagreed upon among the New Generation. The majority vote is that they are not irregulars, even if they choose to rebel consciously. It is only Lumine and Sigma that used the Hunters' own terminology (in simplification mind you) and spoke of becoming an irregular of one's own accord. That is, accepting the label you've been given for your actions. However, even if you willingly accept the label, that still does not mean you can become "the definition" by choice. To become the definition, the only option is to choose to lose your sense of self by committing mental suicide through self-infection with the Sigma Virus, or damaging the thought circuit of your own accord.
Only in the time of Neo Arcadia, when the definition of Irregular has truly changed, does turning into an irregular by choice become a much more easily achieved possibility.