Not to "plug" another cruise line, but having "lived" it ..... Princess does the transition so so much better. Did a B2B on Princess right after our Rotterdam 31 days. Just like on HA, we were relegated to the main stage. But in this case one of the Entertainment crew was in charge. He was so much fun and did music trivia while we waited. We were disembarked by groups (instead of en masse). It was still a long process, but so much more pleasurable than HA's version.
In 2024 we're doing a B2B on Princess followed by a B2B on Holland America. Only booked a Shore Excursion during the HA cruise.