Who is going to police all that and were are the funds coming from?
Over a third of the population owns a dog, and they'll mostly be voting age - does any government want to piss off a third of the population on the level that seizing their family member and murdering it (because that is what their view will be) would be?
The ban as it was carried out caused dogs to be disappeared, transported around the country, handed over to idiots and more than a handful of bites/attacks/injuries followed and quite a lot of dogs suffered horrible abuse and neglect. You might not like the look of them, but they exist because people created them, it isn't their fault and no animal deserves to suffer.
I agree we need some sort of regulation and owner-training, a pre-dog ownership qualification scheme perhaps.
We REALLY need regulation on training, at present anyone can set up as a dog trainer or dog behaviourist and then do all manner of things that will definitely (backed by science) increase the likelihood of a dog being dangerous. It is still legal to slap on a shock collar or prong collar, to terrify or hit a dog in the name of training, to train pet dogs in pet homes to be 'personal protection dogs' - ie, to bite strangers..
We also really need good regulation on breeding - the current set up affects the dedicated hobby breeder - the person who has one litter every few years, does their research, does it to improve a breed or to refine working skills - the most. It does NOT affect puppy farmers or backyard breeders trying to create monsters or just seeking to line their pockets.
Breed or type specific legislation is not effective long term. The Pitbull ban is evidence of that, as is the XL bully ban - and not just here in the UK. In other countries too.
We need accountability from breeders/owners - a microchip system that actually works that needs to be updated, like car paperwork - and retains information from breeder to owner to owner down the line. Caught with a dog not chipped to you, big trouble. Dog caught chipped to you and you claim its not your dog, you sold it to a bloke down the road, but the chip isn't updated - big trouble. Putting the onus on both buyer AND seller to submit details for the chip.
I'd go further - if a dog is involved in an incident and you bred that dog, you are also potentially liable for whatever that dog has been allowed to do, along with the most recent person listed as the owner. Now THAT would sharpen peoples fucking minds!