I agree with Eva San, not that I work any Class E anymore (HALLELUJAH!!!), but back in OZ, you would never ever vector VFR traffic above or below LSALT. They are flying visually, so if you make them fly a heading ie. Via instruments, how do they continue to fly visually. Also the attitude in Oz is they are VFR in E, so they do not ever recieve a control service. If they want a control service they file as an IFR, otherwise, if they are on frequency they will get traffic information on other traffic, full stop, end of story.