After working on this off and on for a long time and trying to take account of the changing European political scene, I finally have this in a form that I'd like to share. Note that this is something of an AU scenario in which the EU changes its system to resemble the German MMP system somewhat. Here is the blurb from the scenario file explaining why this is going on:
A series of crises for the European Union - including Britain's exit, Scotland's plans to leave the UK, rising nationalism, a refugee crisis, and controversial austerity measures - have set the stage for a critical European