DL doesn't denote upgrades on the manifest either. If you are high elite, they will sometimes ask your meal preference first, this perk is hit and miss. Besides the fact that the flight leader will often greet you specially and make small talk (sometimes embarrassing) there isn't much else when flying in front. On the otherhand, if you're already flying upfront, no airline gives you much extra for status.

In reality, there is not much they can do