I recall reading in here some months ago, someone reporting that the LH app - when in the airport - shows you the route to the exact gate. It may only work at their German locations but sounds very good, especially for places like FRA.
The problems of outsourcing is well known to all of BA's customers and they still haven't fixed it properly. We have spoken in here before of the enormous costs of bringing technology into the 2020s BUT ... whilst the upfront cost is high, the long term benefits are also high. One of my closet friends is a high level software development manager and I recall him saying a decade ago that many companies have not yet adjusted to the fact that they are IT companies - who might sell: clothes / paint / books / seats on aircraft. One company who knew this from the start was Amazon. Countless others have not yet made that change.