The report doesn't seem that scary, actually. The sections on particular impacts list reasonable mitigation actions (that don't have the tragedy of commons problem that climate change prevention does); and the particular impact of sea level rise you quote isn't that large or scary - the listed uncertain, faraway damage is much smaller than the certain, immediate cost of CO2 reduction we'd want. It's large enough to motivate local politicians to plan for mitigation activities - since no matter what they do (and in the absence of global coordination) they'll still be needed, we'll face some global warming and sea level rise even in the most optimistic scenario; but losing 2% of national real estate value over 80 years isn't economic justification for, say, meaningful reduction of consumption; sacrificing 0.1% GDP growth per year (which isn't nearly enough to combat climate change) is a much, much larger cost than the $500 billion tag.

As I skim it, nothing in that report has anything to convince people that "we're all going to horribly suffer if we don't act NOW". Yes, the effects are bad, but any personal impact I can derive from the descriptions in that report are on the same scale as the affected people would see in any major economic downturn.

The regional chapters in particular seem to have very little alarming content; it seems to center on "yep, this area is slowly to get worse, so we need extra infrastructure and preparation" - the described effects sound like sufficient justification for an 1% tax rate hike and doubling of insurance premiums, but not sufficient justification to mandate serious lifestyle change to try and prevent the consequences.