There is a change when the country within the EU you depart from has a different price to the EU country you buy it in (not all EU countries have the same price for RTWs):
old rule: you pay the higher of the two.
new rule: you pay the fare from country of departure

eg: buy in UK and depart from Poland
old rule: you pay UK price (assuming UK price is higher than Poland price)
new rule: you pay Polish price.