Yes, that's right. Your focal plane looks pretty much perfect, and there's no motion blur. I think you did everything exactly right, within the capabilities of your camera in that light.
Don't attempt to print this one until you've taken the Sharpening Class.
Actually, I think that method will work ok. However, do you think your client is expecting some cloud detail in the sky? If so, it's going to be much harder.
The reason it works (and yours won't ) is that the background is so blurred, and so "uncluttered", if you know what I mean.
Your background has so much going on, and can't be blurred artificially, I'm afraid.
What I mean is, your file is perfectly neutral. Absolutely no magenta at all. So the problem is with their print process.
Hopefully they have advice for you about what to change in your file to prevent this. But DON'T let them make you pay for the print again. This is a problem with their print process, not your editing process.
Good. Then you need to start the edit again, and make sure that NO sharpening is applied to the file, ANYWHERE in the workflow.
Once you've re-edited it, show me the new 100% crop.
No it doesn't. It's exactly the same. Make sure you only judge moire at 100% view.
In your case, the studio match might be necessary.
You have to search in your Mac settings to find what's causing the brightness to dim. It'll be some kind of power saving thing.