Unless you're a major community center like Lewisham or Greenwich, most community centres in London are built linearly. A straight up and down line with room to grow in only one or two directions.
What I love about Forest Hill is how it is dissected almost into four with shopping branches going down Dartmouth Road, London Road, Devonshire Road and Perry Vale. It creates a community 'heart' which is cross shaped and closer together.
It also shows the importance of how this cross is connected so it IS a shame that the interchange outside the station has not been improved for pedestrians, and also shows the critical importance of the underpass to keep Perry Vale connected and accessible to all.