Just updated to 6.0. It’s not as radical of a change as in updates past, just mostly a slight layout change and you’ll have to update your “muscle memory” accordingly when using it. Looks to be more of an update to justify an app developer’s job rather than fixing existing issues. That said, my next DL trip isn’t until June so won’t get to try the full functionality for a few weeks yet. I’m hoping the irritating “updating itinerary” issue has been fixed that seems to hold up the boarding line.