i'd say what a daring decision of EZ to cancel it's flights whan it cannot be sure if the runway is safe enough! four incidents in such a short time span are definatly a good indication of something wrong.
Clearly EZ and others have put safety ahead of money! That in my opinion is the way it should be in aviation.
Any statement from the airport or CAA are only valid if clearly prooven and it seems that what they are doing now.
Nick