This is the third time you are asking the same question, I work as a doctor and I am busy. I think that you should stop with the repetitive questioning.
the traffic free area looks a bit shabby. There are a lot of people hanging around, the promenade is ok.
Did not go to the pier. Eastbourne is Full of groups of young teenagers from other countries who are attending the various language schools. Can be a bit noisy in the city centre.