Right now warming is somewhere less than 1C per century and dropping. Unless his "corrected" model shows how and when it is supposed to accelerate I wouldn't give it a second thought.
OTOH, there is a nifty tug of war between the old school "it will get really warm" alarmsts and the "will you look at all those storms!" alarmists. Both sides contradict each other. What is missing in the piece about this research is that there must be less convection an fewer storms both tropical and in the mid-latitudes in summer.
And both sides of that are trying to ignore and hide negative statistics, fewer and weaker storms and no temperature increase for the last dozen years. The stormists are relying on the increased reporting of storms (and everything else). We hear about every atmospheric disturbance now when only a few years ago we mostly only heard about the ones that affected us locally or nationally. It seems to some that there are a lot more these days.