Everybody has a reason to stay in their car. A decent park n ride or vehicle permits for the people truly unable to board public transport safely. Although specially equipped mini buses are a great option. Plenty of disabled people are perfectly capable of getting around on public transport.
I agree with what you say about drone shuttles. The problem is, apart from clothing shops like Hollister the shops that are closing aren't being replaced with anything except nomadic shops run by dodgy looking Persians selling etched mirrors, wheelie suitcases, stolen phones and Michael Jackson...
The local councils in Sussex arent the slightest bit interested in improving anyone's lot with helpful schemes. They'd prefer to just throw up high rise monstrosities in Shoreham and Lancing to rake in millions of pounds in Council Tax. The people who have to live under the shadow of these...
To be fair in about ten years time the centres of our cities will have far less traffic anyway. As shops disappear, which they will do. As our parents generation dies out the likes of Debenhams and WHSmith will fall by the wayside. Less delivery traffic and less need for cars if you have nothing...
Pedestrianise everything from Withdean to the sea life centre and from Hove Lagoon to the marina. Make more cycle paths, and get a tram set up. Hopefully allowing pedestrian access to Dixons.