My view is that the dogs should be put down yet their will be others who would love to have the kept alive yet i don't believe these dogs can changed if they have been bred for wrong purposes eg by drug dealers.
There will be dog with good owners have been turned violent by neglect and dogs owners who could be bothered to take care of mans so called best friend
Until the legal process is completed these dogs are other people's property, and police seizures and destruction of private citizens' property is rightly very strictly controlled.
What is needed is a change in the law so that the legal procedures do not take so long.
It should also be possible for the police to obtain reimbursement of costs where the case goes against the owner, though I'm sure the press would have a field day with owners being charged for their pets to be killed.