I would like to think that there were multiple issues singularly related to THAT specific cruise. A lot of things (waterslide, rock wall, dining venues) had VERY limited hours and I believe, looking back on it, that much of it was related to a lack of staff. However, I am still not sure why they brought the luggage up through the middle of the ship. I've been on over 20 cruises and have never seen anything like it. Plus, I've had a number of people who have cruised the Serenade as well saying they didn't have it this way, so I have no idea what pushed them to do it. My only guess is maybe there was some issue going on with the service elevators.
My biggest beef with the ship itself was just a lack of food options. We came back to the ship a number of times and the buffet was closed from 2pm-5pm, leaving only the Park Cafe as a food option. And it was a bit of a mess as no one could figure out if it was adults only or not (since it was in the Solarium). Also, the Park Cafe had a pretty limited menu. I very much missed a cook-to-order grill or pizza place on the deck. I understand other RCCL ships have dedicated Pizza locations, but the Serenade did not. It was only available in the buffet (as was the ice cream!). This was one place that I think Carnival really excelled when we went on the Sunshine the next year. The Guys Burgers, Blue Iguana tacos, Asian wok, Pasta bar, etc, were all included and the buffet was open much longer hours.
Best cruise ever... That's a tough one. I have loved most all of them, but 2 do stand out:
First Cruise: Dawn Princess (loved that ship - food was fantastic and when they played the theme to the "Love Boat" during sail away, I was hooked...)
DVC Member Cruise: Disney Wonder (first trip to Alaska and just an amazing time with all of the Pixar and DisneyNature folks on board - Got to see "Inside Out" a month before it hit theaters and plus, they put out hot chocolate with Bailey's in it for Tracy Arm...)
Although, If I had to pick one only cruise ship to ever cruise on again... It would be an aft cabin on Disney Magic!