Banned, I call BS on these two points as it seems you may have been drinking too much Evans coolant
First pure water is absolutely the best naturally occurring heat transfer fluid on earth, and has a specific heat capacity of 1.007 BTU/lbdegR. All other fluids are fractions of this, including Evans, which has a specific heat capacity of 0.64.
So what does this mean?
For the simplified heat transfer equation of Q = 500 x GPM x deltaT x Cp, it means that for the same water pump flow, say 50 GPM, and the same deltaT, say 20 degrees from top tank to bottom tank, pure water will remove around 503,500 BTU's/hr from your engine, while Evans will remove 320,000. Or put another way, presuming the engine's heat load is the same, then the Evans coolant will result in a higher deltaT, ie the engine will run hotter.
But wait, there's more.
Evans also has a higher specific gravity / density than water
So what effect does that have?
The water pump will pump less volume due to the higher density, so since the engine heat load hasn't changed, the only other variable is deltaT again, and this will cause the engine to run hotter still.
So we have two factors of Evans coolant that will cause the engine to run hotter. This isn't conjecture or my personal opinion, it's first principles of physics and thermodynamics. To compensate for these negatives, you need 1) a bigger radiator and 2) a stronger water pump.
Now, Evans has some very strong positives as well - you pointed out the lack of water as being a plus, and from the corrosion perspective you're right.
You also mentioned Evans' extremely high boiling point of 375degF, which is certainly a plus, and it's for this reason that I plan to try it in my own 550 Maranello.