We cruised on the NorDam two years ago. This is the only thing we have as a comparison. The EuroDam looked like a new ship to us. It is very clean and totally maintained.
Yes the vibration is real. We could even feel it in dinning room while in port. Would this keep us from enjoying the Euro dam again? No. But it is really to bad that such a perfect ship should have this problem.
I understand that a library now supports many kinds of media - But the Euro dam has included to many things into this space. It is really not a place to relax with a book or kindle. It is open to the Crows Nest bar. When the bar is closed the space is used for dance lessons and other noisy activities. When the bar is open there is often live music. The space is like a hallway to get to the bar. lots of loud traffic. It is very nice to have a coffee bar nearby but the coffee bar is right in the library. This is the only coffee bar aboard ship so it attracts many more people. If one would choose to read in this busy place there are very few comfortable chairs. I ended up reading in some of the bars that were much quieter than the library.