Bashiok added some info on minion control and AI in a forum post today. You can’t exactly tell your mongrels where to go or who to fight, but there are other ways to get your pets where you want them.
Minion management is a possibility, but that also definitely complicates the UI and use of the minions. It also seems to indicate that they must be handled with care, and not as fodder in a constant bloodbath like it should be. They’re easy enough to dispatch and re-summon that you already have some interesting tactics with them.
Lets say you have four mongrels out, fighting a group of monsters, and a stronger enemy flanks you. You can summon a new mongrel (or make an old one explode first) which would then take on tanking duty for the stronger enemy that was closing in.
Although finer-control is a possibility, really what it comes down to is not having stupid pets and maybe more interesting ways to game their use than sit and stay commands.
Is this a confirmation that we’ll see better minion AI in D3?