Couple of pics would help. As for " keep the smaller window, frost it and have the builder remove the inside trim then completely drywall over the window keeping the look of the window outside but losing it inside? Will it look half ass and dickie?" Yes.

I wouldn't drywall over the window. Take a look at the options for recycled brick, they may match better than you think.

We have that exact sink! And a very small powder room stuck in the 80s. Only difference is our door is on a side wall, and there is no window. We're no where near finished, but just ripping down the pink floral and stripey wall paper has made a huge difference (including revealing the toilet is in fact white, not pale pink). We're going to replace the rather unappealing plastic sink with a tiny ceramic one with new taps, and the old plastic cistern with a new colonial style ceramic one, and new seat (keeping the toilet base as it is in good condition, and classic style). Then new paint, and a good clean and regrout to the floor, new light shade, toilet roll holder, storage in one corner and art.

We’re renovating our bathroom & toilet rooms. In the bathroom we have taken the tiles all the way to the ceiling. I’m wondering if that will work in the toilet or if it’ll feel too cold and cave like. I definitely want tiles around the toilet area as I don’t want painted/papered walls in an area that could get urine splashes on it. Has anyone got photos of a tiled toilet room, or other ideas that may work better?