I know a few years ago Blizzard were looking into detecting XIM users on console with a view to banning them as they don’t want keyboard/mouse users playing on console. I can only hope that they were able to come up with a solution and that solution will be in Overwatch 2.
No, we should not, because it gives them an unfair advantage over controller users and, according to Blizzard’s own definition, anything that affords an unfair advantage is cheating.
Incorrect. See above.
As for alts, a lot of them will go away come Overwatch 2 because of Blizzard’s requiring a phone number on accounts.