Your rationalization is kicking in here by you trying to downplay the importance of climate sensitivity. It is actually very important. Catastrophic AGW depends on a high climate sensitivity. The AR5 has lowered the climate sensitivity parameters and now for the first time has given no best estimate of climate sensitivity due to lack of agreement on values across assessed lines of evidence and studies.Krusty's excuses No. 5:
Look for "good news" from science and exaggerate it's importance.
So they are now less confident in climate sensitivity, but are more confident than ever that we will have catastrophic AGW. This is what you are trying to rationalize.