I tend to fly First Class (domestically), so the points values will be a bit under.
UA = $0.012 or so per point
AA = $0.02/point
B6 = $0.011/point

DL is the outlier. Why? Well, "average" about $0.011/point. However, lately DL has been about 3x-4x the price (cash) for First class compared to their competition, so that will totally skew the values to upwards of $0.04/point I've found. (very dependent of course).

Given the redemption rates, I'd say absent SUBs, it would be better to use a 2% cash back card and the 5% cards (Discover/Chase Freedom) with the rotating categories.

I agree OMAAT valuations are more "in line" than TPG. VFTW is also mostly realistic, IMO as well.

Hilton Honors is about $0.015 unless you can snag the Maldives or something like that with the lower rates, IMO.

But everyone's situation will be different (how much do you spend, on what, etc.)