osbornk
Old man in the mountains
covering the cylinders with more fins would increase warm up times, reduce economy and add weight.
Removing all fins and adding an water to water oil cooler would speed warm up, improve economy and increase engine life.
But if a lot feel like you, I am sure there will be engine dress up kits.
Rod
Most of the Harley clones are water cooled but still have fins to look like they are air cooled. The 84 Honda Magna was water cooled with "cooling" fins and it was not a problem. The fins were thicker I suspect were not truly a cooling aid since they were on the outside of the water jacket so the heat did not have a direct connection to them.