Went through this earlier - video on this tweet https://twitter.com/liam_peanut/status/1223309446308384770?s=19 (not my video). I've seen the station pretty bad but that was pretty scary coming off the jubilee line as new trains were arriving with nowhere for people to go. It all seems to be because central line eastbound was off. Took me 10+mins to get out of the station. The station really needs a rethink. I think there could be a bad crush there one day (imagine if west ham were playing, for example, and a fire alarm went off and caused panic). I can't really see what TfL could do apart from stopping Jubilee line at West ham (which would cause enormous disruption in itself).