Dhaan,
I understand your point. It would be difficult to design high performance into any product without some sense of best practices. But....
Performance of a loudspeaker is, as a practical matter, only meaningful in room. Room contributions often overwhelm the intrinsic (to the extent that this word has any meaning in this context, you can probably substitute "anechoic") character of any loudspeaker. Hard as this may be for a disciplined designer to swallow, a "poor" design may perform very well in an unanticipated environment.
I have used the P/E in 4 rooms. The last should count as two, pre room treatment and post room treatment, as the character of the room changed so drastically after treatment. In 4 of these rooms (#4 pre-treatment excepted) the Verity produced an exceptionally "natural" sounding tonal balance. Not merely my opinion, but that of literally everyone who's heard it and offered a comment (lots of folks).
I only see 3 possibilities here:
1) My speaker does not have the same performance issue as the Ovation, presumably due to differing design.
2) The speakers do sound similar and the vast majority of listeners (admittedly not tested for statistical reliability) mistakenly think they sound natural when they are obviously poor sounding.
3) The speaker - despite its design - sounds natural to most people in many real world environments, but your evaluation is different.
#1 or #2 is possible, but I suspect that #3 is at play here.
To explain this, you point to biases (owners love everything they just bought) among listeners. Certainly possible.
I'd only note that you ignore your own potential bias. You produced "Exhibit A" to support your argument: an anechoic graph that was of limited indicative value to me. "Exhibit B" was listing certain Verity design decisions that violate commonly accepted (I hope I'm characterizing your position fairly) best practices.
Clearly, you disagree with the design choices and believe that the raggedy anechoic response illustrates the cost of these decisions. (It certainly wasn't pretty, I'll give you that!.) I'm merely stating that - despite the design choices and anechoic result - I have not found a soul in my home, in print, or on-line, who shares your judgement that these speakers present an obviously and significantly flawed tonal balance.
My point is that these factors might be coloring your judgement. Or you may be right.
Marty