Maybe they are serious when having set sail for proving me wrong...?!
An official comment/announcement has been released. They formally recognize the existence of "problems" with the AI and pathfinding, they recognize that these are widely known by now, and they announced to have started working of a dedicated patch for these issues, indirectly indicating that it is a huge task.
I would be happy indeed to be proven wrong, and would be the first to admit it. I recognized above that BI indeed offers longterm patching support for their ArmA series, I just criticized that in the past they were not successful in patching AI problems. If this time they score a first in achieving that, I'd be happy.