I think the taupe in the floor tile may dominate the gray as I'm seeing a warm color palette. That's making the gray shower tile the odd man out. I think it also may be too contemporary with either of the shower floor tiles, and your home looks traditional. I could see either of those shower floor tiles with a large format subway tile in white for the shower walls. I also don't like the stripe of the wall tile with the stripe of the accent tile, nor with the splotchy floor tile. So I'd eliminate the gray wall tile. The first thing is finding a counter that works with the existing floor as there are limited counter choices. The colors are okay but the splotchy pattern is a bit similar. But it may be the best you can do. Or use a solid warm white, which gives you the same counter you have in quartz, and you're probably ready for a change. A white vanity will make that quartz appear a little warmer and that might be a nice way to separate the counter and floor. Are you keeping that vanity and painting it? Or ordering new doors and drawer fronts?

This is another bathroom that didnt have any gaps with the tile and no gaps on the actual valve trim kit as a comparison.

I love the classical look of Perrin and Rowe but very difficult to get here in the states (have to get the thermostatic and then an additional valve for the 2nd rainhead) but don't love the expense and all of the metal that would be required. What's your budget, and when you mention that you don't "love" "all of the metal that would be required", what do you mean? The classic, traditional Perrin & Rowe look means an exposed system, which means lots of chrome or other metal finish. Have you looked at Rohl shower systems at faucet.com?

That is strange and annoying. Unlikely that you'll be able to get a rod that goes specifically in that bracket. I would take it out and put up a new one alltogether that is either a tension rod or it comes with it's own brackets.