Burn drive has always been a dangerous thing for the AI to use because it's quite indiscriminate. Ships will use every mobility system they have to close with the enemy at the start of a battle, leaving them drained of charges at the start of the fight; they will then use it every chance they get, regardless of whether or not its in any way a good decision (coughSTATIONScough.) Burn drive is one of the worst offenders because it takes so long to end, leaving the ship unable to make choices while the enemy answers with free shots to their sides and rear. For a ship that ISN'T the biggest boi on the block, this is inviting disaster. destroyers need to remain mobile and responsive or they die immediately; burn drive takes away their most important survival tool for an eternity in combat time. I've got CAPITAL SHIPS that can vent a full flux bar faster than burn drive runs down. That should be saying something.
Maybe another system would be better for the enforcer after all...especially when you look at the enforcer's layout. It's meant for firing at things encircling it, not focusing all its fire on one target. It doesn't have the flux to consistently alpha strike a fleeing victim, missile slots notwithstanding; it's stats suggest to me that it's a bulwark, not a hunter. Perhaps flares would suit it better and add to its point defense, solidifying its role as a line ship. If I do use one, I usually load it up with strong point defense weapons and deploy it against carrier spam; I don't even have to bring my own popcorn.