Which parks are these? Closest example I can think of is Walibi Holland but even that was stagnant until the last few years (same as it's Belgium cousin) when the owners gave it a deliberate long term plan. Edit: The Walibi parks are far more family friendly than Thorpe. Even with their big rides (at Holland mostly) they step towards more family thrill as opposed to out and out thrill. Untamed is a 1.2m ride! As is Lost Gravity.