I’m very much in agreement, Michael. Signage at many stations leaves a lot to be desired. I’m not convinced different readers for entry and exit would work necessarily. It would be another chance for things to go wrong if someone didn’t have time or space to read the labels. It would work where there are clear lanes for each direction, but that just isn’t the case in most places in London. Also, prominent signage can be an issue in crowds where there isn’t enough room.
However, this particular situation is a serious issue, given that people could be reported for prosecution after doing the right thing. TfL are aware and I hope to have a swift update.