In V5, at the bottom of the Cooling tab there are new options to "increase fan speed for excessively quick layers". So that will adjust the fan speed based on the size of the island, which is very helpful.
There's also bridging settings on the Other tab that will adjust the fan speed for steep overhangs. To enable that, make sure to check the "Apply brining settings to perimeters" option and "override fan speed while bridging".