There is a good discussion about the passenger seat on the Hybrid forum. Do a search on car seat cushions and you'll find several options. Pick one that is tapered so that the back of the seat is raised more. The seat cover is from Costco. I cut it in half and just used the bottom part.
I had the same problem with my wife feeling like she was sitting in a hole. My solution was a foam pad with a sheepskin seat cover over it. My wife has had no complaints in the 18 months since the mod. Switching to the regular power seat will still not give you a height adjustment.
I think the added adjustment is the tilt of the entire seat, not the height. To get a height adjustment on the passenger seat, you need the heated and cooled seat option, available only on late build '14s and the 2015s.
The ambient lighting kit that is available for the 2013 comes with a small push-button switch. A hole only about 1/2" diameter has to be drilled wherever you want it. The factory calls out an area just behind the cupholders in the center console in the '13. You just push it to select your color or turn it off.