EU-wide elected MEPs opposed by Socialists and Eurosceptics ?

Strange impression that Socialists and Eurosceptics oppose Liberal Andrew Duff's proposal to start electing MEPs from an EU-wide list in he next EU Parliament Elections, supported by the EPP and others...

What's really behind this mig-mar ? Delays (by postponing EU Parliament's vote, etc) may render the proposal inapplicable, in real practice, to the 2014 EU Elections, and that would be a pitty.

Particularly when some (as f.ex. former EU Convention's Chairman, f. French President Giscard d'Estaing, etc) recently suggested to call for a "European Constituent Assembly" in Strasbourg on 2015...