New style in Copa del Rey?

Inspired by basketball's Euroliga, where the final winner is decided by four teams in one city, now that same format La Liga want to impose on its Copa del Rey competition. The idea is that beginning from the semi finals stage - the final four style format will be played in one city. So the last three games in the cup will be divided in: semi final stage, which will be played during the mid-week, and the final will be on weekend. But the main problem will be the adequate accommodation of the travelling supporters. The other problem would be the infrastructure as many cities can not host four teams with three games in such short period of time. However the clubs are in favour of the idea.
This year's final will be played next Sunday at Vicente Calderon stadium in Madrid between Barcelona and Sevilla.