The lower bound of that estimate is no big deal.

1.5°C per doubling?

It seems a pretty big deal to most people who understand it. On what basis do you call it no big deal?

Note that the upper bound is fucking horrific. Which is just as likely as the lower bound.

The actual lower bound should be lower but they de-personed Lindzen and Curry.

No, Lindzen's iris theory was just wrong. As paleoclimiate reconstructions show most clearly. It wasn't right in the past.

Curry has a lot to say about uncertainties, which apparently she hopes all pile up on the side of amelioration of climate change. But she has always accepted that the Earth is warming, largely due to human-generated greenhouse gases such as carbon dioxide, and that the plausible worst-case scenario is potentially catastrophic.

Both their work is considered. But so is that of many hundreds of others.