I don't think 'whizz straight through' will be quite the right phrase to use come 28000. I'm also pretty sure the travel voucher on the bus won't take you as far as Worthing. It didn't in the Withdean days. Probably fringes at Shoreham like the train. It's a good deal though.
There are many reasons why lots of STHs have CHOSEN to buy in SW corner. See lots of posts on ESU Block C thread up to a few days ago. Don't have such a narrow view of what is superior and what is inferior.