Well there'll be a ceiling mounted light which should theoretically cover the whole room. This then should be decorative but also will provide some coverage to the sides of my face. There are significant height difference across our family. I was hoping to find a one-size-fits most height, that also looks good!

A bathroom needs a GFCI receptacle that is easily accessible by the vanity, but any additional receptacles in the room are optional. I usually use only one GFCI receptacle circuit, but always make sure there is one wall receptacle on the circuit near the entry door (for a vacuum cleaner, etc.). Based on the current popularity of fancy commodes (with bidet, etc.) I may start putting a receptacle near the commode. The counter height GFCI receptacle on the vanity side wall meets the basic requirement for a bathroom. I would probably just move the double GFCI receptacle on the long wall down to standard height and leave it there. That might also be a good location for a heated towel bar. Where to put the sconce is a combination of esthetics and electrical requirements. Most fixtures can be located as close an an inch from a side wall, but might look funny that close. You also need to work around the placement of the medicine cabinet and the swing of its door. The attached picture will give you an idea of what you might need to consider with sconce and medicine cabinet placement. If you look closely you will see that the medicine cabinets are slightly off from the sink bowl center, since that is the only easy way to make them fit with the three sconce lights. The placement of the sink bowls is determined by the vanity (cannot be changed), but lining up with that sink centerline would have cut into the space needed for sconces on each side. The sconces could not be moved farther out because they got too close to the window on the left and the wall on the right. Bruce

Have you converted the switch to a dimmer? Then you can control the light quantity output.

Why do you want them higher than eye level? That is the recommended height. Also, a patterned shade like the one you're showing is not going to give you the best light for next to vanity mirrors in a bathroom. Those are more decorative than functional. Instead of hi hats in the ceiling consider using semi-flush fixtures which can be your decorative feature. They also provide nice general illumination for the room instead of a spotlight effect.