This statement, while true, is so obvious its not even a discussion for me.
99.999% of cases inventing a new technology falls into reserch institutions. Companies usually dont invest anything in conceptual R&D. They just invest in their application. This applies especially to Pharma and Tech companies (which includes gaming companies).
Simply put, hiring a team of mathematitians with a super computer (assuming such a thing can be done with current hardware) to devlop a new AI nobody has ever seen or thought about before⌠so that Brann can stop being a looser⌠is a guaranteed money dump. Its such an obvious money loss that hoping for a better Brann is beyond Copium. Its religious fanatism at this point. Cause it wont happen. Ever.
As for reserch institutions. Why would they invest their time in a novel AI specifically for controlling NPCs in games ? You need to wait for a very, very gamer Uni Professor for that. And even IF such a person existed, because modding is illegal in WOW all his reserch and testing would be in illegal servers. Which is a problem on its own.
You know who you could ask for an AI that actually mimics people ? The botters. Those guys. Those are the only people that are activelly investing in AI technology to mimic human behaviour in WOW to prevent Blizz from catching them.
So at best, you can get a Brann that is very good at farming gold.
IMO, if Blizzard really wanted to make a good Solo Experience they should not add any NPCs. They should either make 1 map per spec (like mage tower) or ban tanks and healers. Only DPS experiences and tune the damage accordingly.