for our use case "Passenger information within trains" it is essential to have some kind of area that surrounds dedicated infrastructure objects (most important are OCP's) available in RailML 2.5.
We use areas to control the dynamic behaviour of the PIS. For example, the PIS system initiatates an announcement in the moment when the train enters the area of a dedicated station.
A fusion with a generic area element is reasonable for us as well if a link between the underlying infrastructure element (i.e. ocp) and the area is supported.