Complex sentence: "Penny" has left, and after years of chaos and despite Brittas still in charge, the Leisure Centre has actually made some successful progress; but Whitbury Leisure Centre will always be Whitbury Leisure Centre, which still doesn't fall short of the odd disaster.
Split into simpler sentences: Penny has left, and after years of chaos and despite Brittas still in charge, the Leisure Centre has actually made some successful progress. However Whitbury Leisure Centre will always be Whitbury Leisure Centre, which still doesn't fall short of the odd disaster.