Thanks for the tour Richard. It is a lovely loft conversion and the staircase is a lovely design (especially the small spindles by the window). A good use of space too. I’ve worked on en-suite bathrooms in loft conversions where the bathroom is nearly the same size as the bedroom (i.e. way too big). All you want is a small space to Shower, Shave and S#1t !!!! (pardon my French).
The hole for the rad pipe tbh I would have done the same. It’s right on the edge of the tile and it’s not worth using an expensive diamond drill bit. I am sure you will be using a chrome cover plate over the hole.
I would get that triangle cut changed, but the other dodgy cuts I would use a slightly thicker bead of Silicon.
I agree with you that the feature wall in the shower looks a bit strange, maybe the tiler wanted to save you money by not using the same colour tile!
The thing is that when/if you come to sell your house nobody is going to spot those mistakes…….unless you sell it to a tiler!!!!
It does look like an expensive hotel room. I’m sure your Wife loves the extra space just as much as you do. Money well spent.