I decided I didn't like the look of my 2017 base wrb chrome headlight housings. I decided to paint the inside black. I also installed the morimoto switchback mod. The install was very easy and I think it looks much better.
Do a search on painting 2015 wrx headlights. There are lots of very detailed guides. It only took me 3 hours. Very easy to do. I will say most guides say you have to bake headlights in order to split them. However for 2015+ headlights they used a new adhesive so you do not need to bake them anymore.