Global warming won't result in evenly distributed consequences, beneficial or not. For instance, the earth's polar regions are -- and will continue to warm -- more rapidly than equatorial regions. So, what's the problem with that?
Melted polar ice will raise ocean levels enough to obliterate most of the world's coastal cities and lands, where the largest concentrations of people live. This won't happen overnight, but it also won't be avoided overnight, either. Fisheries and farm land will also be disrupted (most fish are hatched along shorelines).
Continental regions will not experience global warming evenly, either. The American southwest region is expected to experience deepening drought and excessive heat. The north mid-lands will experience not just more rain, but more rain in more frequent heavy rainfall. So, what's the problem with that?
A lot of people live in the SW, and as it becomes hotter and drier, their continued residence there will become increasingly unsustainable. They will have to resettle at great cost. As for the northern plains states, the source of a huge share of the nation's and world's food, they tend to be flat. A 10 inch rainfall on top of higher average rainfalls generally means flooding (which is bad of course) but it also means a drop in crop yields as flat fields stay under water for too long a period. A drowned corn, wheat, bean, sunflower, etc. crop in July means no crop at all. Even with a longer growing period, midsummer crop loss means no crop that year.
The glaciers in Asia are melting. The ice will be gone sometime in this century. Yes, there will be heavier -- and more unpredictable -- monsoons. A 20 inch rain would seem to solve the problem of glacier loss, but it doesn't. A sudden heavy rain (say, 10-20 inches) is too much to deal with. The soils can not begin to absorb that much rain, and it runs off causing severe flooding.
As one approaches the equator (even as close as the southern US) excess heat will make it increasingly difficult to spend the usual amount of time outdoors during the summer months required to run agriculture, fisheries, infrastructure repair, roofing, and so on. This will most likely be a late 21st century problem, but that's only 60 years away.
So yes: there will be benefits. One will be able to ship goods through the arctic ocean between Europe and Asia. The downside of a warm arctic is more methane in the atmosphere as the tundra melts and starts rotting, and releasing methane hydrates. Methane is a much more powerful greenhouse gas than CO2.
A warm Arctic might also mean a disruption of surface and deep ocean currents. So who cares? If the gulf stream is disrupted, Europe will get a lot colder. (It won't warm up enough to eliminate winter.) A much colder, and maybe drier Europe, will not be pleasant.