The seek and destroy waypoint used to have different behaviour. What used to happen is that vehicles with seek and destroy would having spotted an enemy stop and engage it before continuing on, in effect the moment they found an enemy they would engage and not move on aggressively but with some caution.

The current implementation however has changed dramatically. The AI will continue to drive towards the waypoint regardless of contact, engaging as they move. They will in effect bull rush the waypoint. This behaviour is not as good as the previous implementation and causes issues in missions where vehicles will suicide run towards the enemy to try and get close range kills where they should instead stay at longer ranges and utilise their long range weapons more appropriately