Ganske vist har de interinstitutionelle forbindelser udviklet sig på en sådan måde, at EP i højere grad deltager i lovgivningsprocessen, men trods Fællesaktens forbedringer har EP stadig ikke opnået en rolle som medlovgiver, hvilket dog er ønskeligt på baggrund af dets demokratiske legitimitet.
Although interinstitutional relations have evolved in the direction of greater participation by the EP in the legislative process, despite the improvements made by the Single Act the EP has still to be granted the role of joint legislator which its democratic legitimacy would suggest was its due.