It is extremely difficult to match a single front tooth. I think your dentist tried to do everything right. The lighting in your photos isn't ideal so given what I can see the crown may still need a little refinement. I would share your concerns with your dentist. They seem to be going the extra mile to make you happy.
I agree that's it's close enough that messing with it more may not make it any better. Is there a metal post in that tooth? Blocking that out can be tough.
Difficult To Match Color Exactly
Since we first started using porcelain it has always been a difficult, but not impossible, task to match one front tooth to another. Difficult yes, but not impossible as I said. It really is in the hands of the ceramist.
Tough to gauge the match on the photos. The lighting, photography etc plays a huge role.
For the most part, at first glance they look fine. Don't overthink it. IMHO