Bashiok made a comment on the issue.
"If I didn't have bad luck I'd have no luck at all."
Not a single good Bot program uses follow anymore. Its all these weird waypoints and click-to-move.
It will obviously not have any insignificant impact on bots in BGs, give them a week or two and tada.
I do like the change though since it puts a stop to the damn multi-boxers that made BGs like SotA very frustrating.