It was worth at least 2 tenths by driving over the kerbs at the chicane plus the time it saved him returning to the correct line with the loss of drive.
Bigger speed humps is definitely an option, you shouldn't come out the other side ahead.
What were the stewards waiting for? Three trips (that was televised) across the chicane under pressure, the last being blatant, two covering moves to avoid being overtaken when compromised on the exit.
I need a job as a race steward, I would set up in the pool at Valencia to enjoy the view and hopefully the race wouldn't get in the way of having a good time.