I know it is not really significant, but I love the glass elevators on Vista (Noordam) and Signature class. I have to agree with other posts, for Alaska, the itinerary is big in the decision.
I did this in July 2023 and it matched the description and photos. I would say the distance to walk was less than 100 meters (or 100 yards, your choice). Maybe even half that.
As Crystal stated above, the HAL Deck Plan shows that 7006 is rated for two passengers. Note the circle on 7010 which indicates support for three passengers. I hope the image uploads.
I had a Lanai room on the Maasdam. The sliding door to the promenade area had a powerful force closing it. You will not be able to leave that door open.
One more item I recall, there was a small table for drinks on the verandah. And those on deck 11 are fully open to the sky, no cover above. It takes a couple minutes for your brain to absorb that difference from other decks.
For the music player, HAL does not list any officially in Spa Veranda, but they seem to be present. A few years ago in Eurodam, my player was Bose and worked via Bluetooth. No cable problems.