Sadly, I think there is evidence that currently the finances and publicity of Merlin are mismanaged, I.e. growth in revenue, growth in visitors, but less revenue from returning visitors. The system of offering free returns to non-annual pass holders after paying for one day ticket is hardly their best idea.
Major incidents at "entertainments" require sensible reaction to encourage continuing and returning visitors, whether those entertainments are a one off, arranged on an annual basis or a daily opening location. The investigative authorities have a part to play in this and their co-operation or not, can cause the demise or success of the next similar event. The majority of those who then maintain that "it should be closed, not allowed, or restricted" will be those who don't attend those events, and those who have been sadly affected by incidents. Knee jerk reactions are the main cause of the cancellation of most recurring events, whether that be an injury sustained by a fairground ride, or an aircraft crashing at an airshow. No-one demands that a motorway is closed and grassed over following a fatal accident, rather, "get it cleared, I need to get on", why? because the majority use the motorways.
My opinions only.