The following articles by Florian Rödl have appeared on Verfassungsblog:
Christian Joerges/Florian Rödl: EU-Kommissionspräsident: Wen und was wollten wir eigentlich wählen? (in German)
Christian Joerges/Florian Rödl: Would the election of a Member of the European Parliament as President of the Commission make democratic sense?