Well I don't know exactly what kind of reduction it should be and like I said I don't know if it already is in effect... I was watching a Y fare at just over 400€ and it hasn't changed, so even if it was only a VAT reduction from 24% to 11% only on the ticket price (no airport taxes change) this should still have caused the price of that fare to drop by about 40€, which it hasn't. Unless it only applies on domestic flights, in which case it is an extremely small benefit, since a 100€ ticket will only see a price drop of about 6-7€.
Anyway...