BEST's Warming Expectation is on the Low Side

One thing to note is that BEST's expectation of future warming is actually on the low side. Muller is said to write:

"I expect the rate of warming to proceed at a steady pace, about 1.5 degree F over land in the next 50 years."

That's a rate of 0.17 °C/decade over land. But the land is warming faster than the globe as a whole; in the last 30 years the ratio of the trend of warming over land to the trend of global warming is 1.58 for HadCRUT4 (1.27 for UAH's lower troposphere).

So BEST's global warming rate for the next 50 years would be something like 0.11 °C/decade, which is low -- HadCRUT4's global warming rate for the last 30 years is 0.18 °C/decade....