I've made some updates, along the lines of the following changelog. I'd appreciate a proof read if anybody has time, just quote this post and I should see it.
What can I expect on board - At seat power, new trains
Collect my tickets - Eurostar mobile app
Check-in - No more mention of Eurostar Frequent Traveller card allowing check-in 20 minutes before boarding
How do I find my seat - description of both train types
Seat arrangements - with up to date information and both seatmaps updated.
On-board catering - updated info, removal of Leisure Select thread (as much as I still long for it, it's not coming back after all these years
)
Compensation policy - updated with vouchers instead of free travel (also a sad change, but not coming back either)