Great (albeit somewhat complicated to digest) analysis!
One other thing I also look at when valuing points, is product substitution. So whilst QF may charge a certain amount for a business class fare, competitors often have lower fares. For me, and I am sure many people, business class is the appealing thing, not specifically QF business class, therefore other airlines will often be a (more than) adequate substitute for QF (JQ being one very significant exception!!!). For example when valuing QF points and QF are charging $4.5K, yet SQ are charging $3.5K to get to same place in around the same time, I would use the $3.5K rather than the $4.5K. So a "substitute airline" cents per point is also a worthwhile parameter to consider.
Some examples of this:
One extreme - a real life example - last year I purchased an SQ business class fare to get back from Europe to my home (in Singapore) and onto Australia. The fare was ATH-MEL return as follows - ATH-SIN - 7 day stopover - MEL- 4 days - SIN- 11 month stopover -ATH. Fare cost was ~$3400 AUD. It really didn't matter where I flew from Europe, and comparable cheapest QF fare was around $5500 AUD. An award FRA-SIN/SIN-MEL-SIN/SIN-FRA would have been fine too. As essentially 4 separate awards, this would have been 288,000 QFF pts + $900 in taxes - (the Zone 10 OW being no good as not allowing two stopovers in same city) So to value my points, I would use the SQ fare - QF taxes. i.e. (3400-900)/288000*100 = 0.87c/point, let's call that the "SCPP" (substitute airline cents per point) vs QF 1.6cpp. So effectively using my QFF points on flying are offering little real value, as I could get a woolies gift voucher for not much less than that. But using your RV parameter , the equation is(18730/288000*0.015+$900) or 3.58. which doesn't sound too bad.
Even using the PER-JFK one way example you used above, looking at available substitute fares, and see that both SQ and CX @ $7600 are adequate substitutes for QF. So the SCPP is now only 5.5 . You could even say EK is an OK alternative (from PER anyway!) and their fare is $5000, reducing SCPP to 3.5. So, I don't think it's even worthwhile using the QF fare as my measure for CPP.
What I'm saying (I think!) is that you need to look at both CPP (or SCPP) and RV hand in hand to get a good measure of what the points use is really worth. If you don't jump certain hurdles on CPP/SCPP per point then forget looking at any other measures of value.
Of course it is always going to be different for different people .