VAT changed from 19.6% to 5.5% but there is no legal requirement for any restaurant to change their prices. They can pocket the difference, however market forces will probably induce some change even if it is not the whole 14.1%. It is only on food, not alcoholic drinks so watch the bar bill. Some restaurants have aggressively dropped prices but up to 20% but others???
I suspect it is a bit late in the season to see much of a difference but next year, who knows?