It's frustrating how little public facing transparency is coming out of crossrail IMO considering the massive overspend.
We've had the odd video on their youtube channel of station completion, plus a couple of meaningless explainer videos.
Any actual updates are hidden away in City Hall or TfL board meeting notes (which I'm sure if they didn't have to publish, they wouldn't), and even these are pretty vague with a lot of 'optimistic' sounding language. I'm not entirely sure how much has changed here. I don't understand, for example, how station productivity at bond street has increased substantially, but the whole project has been put back 6-9 months.
My personal guess is that train testing/signalling is still a total mess. It may be a coincidence, but eg: platform doors didn't open on the last video (liverpool street), and the destination signs had nonsense in them (bond street) - there's no way test trains are running to T5 for example. I'm sure they would highlight platform doors opening working if they did properly.
Very little hope here to be honest. Considering it took ~18months late to get similar trains working on the GOBLIN which is a pretty simple operating environment, I really doubt it is going any better on crossrail.