As someone who studied meterology and paleoclimatology in university, the result seems completely obvious that a whole lot would be different if circulation was reversed. Weather is mostly large-scale turbulence, driven by the entropically irreversible phase change of water. I suspect a mild case of Dunning-Kruger effect here -- on encountering evidence, you changed your position quite quickly.

If you look at some prehistorical events, like the closing of the isthmus of Panama or the opening of the Tasmanian sea, these had a huge effect on heat flow throughout the atmosphere continents away, enough to inaugurate new geological eras, you can see how everything changes based on the shapes of the turbulence.

There are interesting things in the results though. When the wind direction switches in California now, you turn into a downslope wind driven desert with power failures. But if you reverse the flow everywhere, this study looks like it's doing some sort of eddy thing through the Gulf of Mexico, and probably driving a bunch of hurricanes to L.A. Can't really tell looking at that weird ITCZ though... but it looks like the Congo would get absolutely slammed by hurricanes in this scenario.