While I'm sure it was fully clear in advance, I hadn't appreciated the
plan to go to Woolwich in peak time and Beckton off peak - can anyone
explain the reasoning behind this?

Is this a long term plan? It seems absolutely insane?

I had believed that there'd be something along the lines of a 5 min
alternating service going to each destination, rather than 4 hour blocks
of every 10 mins to one destination.