deecie -
You are repeating what is - with respect - a common misconception. When you factor in the time taken to actually get from plane to train, Southend actually compares very favourably with other London airports - particularly if you are travelling to the City of London district. What leads you to believe differently? How did you fare last time you used Southend? Last time I arrived there - hand luggage only - I was on the station platform some 10 minutes after descending the steps from the aircraft.
And before certain Stansted / Luton fans chip in - yes - we all know that there is still work to be done on persuading Greater Anglia to provide additional trains to the airport in the early morning and from the airport in the late evening.