Global Warming probably won’t create a more ‘benign’ planet - the added energy in the system will probably make the weather more energetic. Bigger storms, stronger winds, etc.
However, I believe the consensus is that overall, global warming would be a net financial benefit for increases below about 2 degrees. At those levels, it manifests itself in the northern lattitudes in the form of more moderate nighttime temperatures (causing a reducting in heating costs), and longer growing seasons. Plus, the agricultural belt would expand a little more northward, opening up more land for farming.
But pretty much any amount of warming will hurt the poor equatorial countries, and they are the ones that are least likely to to be able to afford it (and have the least responsibility for creating it).
So, I think a reasonable ‘compromise’ for moderate warming would be for the rich countries in the northern lattitudes to compensate the poor equatorial nations for the effects of warming.