It will be interesting to see what they are going to implement in this 3 hours downtime.
If they do include a reservation/booking option maybe it will be time limited, i.e. max charging of 45 minutes, or up to 80% which has been discussed before .
In the case of time limit you will know how long you have to wait before your turn and you could possibly see the queue time on the app ?
Could be remote booking like PTT reserved charging schedule but that was always a little contentious, or you have to turn up and scan your phone to put yourself in the queue which would be preferable in my opinion.