Their reference to "temperature guessing" suggests they are developing the proper technology to make setting coil temperature simple and bulletproof.
It's always possible they're developing something new, but they call it "temperature guessing" because that's really what it is. No TC mod is measuring temperature, they're measuring initial resistance, change in resistance, applying a material curve (nickel, titanium, etc.), and calculating what the temperature should be, but not necessarily what it really is. Since it's not measuring, it's guessing.
One of the problems with this method is it doesn't take into consideration the resistance of the atty itself, or the connection (510/P3 to tank, tank to head). You know how sensitive the IQ meter is in the P3, and that's just battery to contact. Throw in a few more variables, along with the need to measure resistance accurately in the thousandths of an ohm, and you get why there's a lot of "guessing" going on, and a lot of people having wildly different experiences with TC.