I have deleted 64-wow and I have no problemI would say that swapping was part of a computer issue while updating antivirus. TBH there are 100 reasons to use 32 bit. Its only an issue now because it takes a special tool/technique to get into 32bit wow.
Do we know Blizzards know if you use 32 or 64 bit? What does a switch mean? You could use a different computer, some players play on different machines. Okay lets say Blizzard knows you use the same machine. You could "test" it or maybe you thing somethink runs or looks better in 32 or 64 bit and so one.I has been said that Blizzard was monitoring accounts that swapped between 64 and 32. Some play manually in 64 while botting in 32...