This is extremely unrealistic but i would LOVE a reintroduction of the Thameslink Sutton service via Crystal Palace, sorely missed post-Covid. i would also love for the current West Croydon via Palace trains to instead terminate at East Croydon instead for onward connectivity; you’d think it logical to always head south for places like Gatwick and Horsham from SE London, but for us folk in Crystal Palace the quickest and easiest way currently involves heading north to Clapham Junction/London Termini just to then head south again