Sorry to say mate but AI in place/ already in campaign means nothing, I know how it looks, it seems like they must have built a whole system to control various beasts and why would they do all that work just for a few seconds in campaign?
But simple fact is the games engine has all that pre built in. Just a few lines of code to jump to another character model with basic cut n paste movement, it’s really not alot.
Hope you don’t feel I’m jus being negative too, jus wana clear you up on false hope regarding the feeling it’s already been half implemented.
Don’t loose hope, I’m not, I REALLY want to see it too, and prey TC take this feedback an give us something amazing, a beast mode+ like 
Ofc just because the engine does have alot of that done already it also by no means indicates they haven’t implemented alot of beast mode functions under the hood ready to go soon.
It just doesn’t indicate that it does
That’s false hope
I don’t like false hope
TC give us real hope, I may have been beast modes BIGGEST fan, seriously, huge gears MP fan but forgot to play vs in gears 3 lol