I too am currently on the ship and have a different perspective to the OP. BUT, but, but, but.....I probably have a lower bar of just needing cleanliness, no work, sunny weather, cocktails on tap and on this trip, a good travel companion.
What I really like - decor; although it is a lot more plush than other carnival ships and unless cleaning, and I mean thorough cleaning is a regular occurrence, I can imagine the ship will look grubby in a couple of years. There is so much material. Love main dining room decor too. Crew - all the crew I've interacted with have been super polite and helpful. I could never have a job where I need to remember the names of thousands of people and their preferred drink (or could be the fact I'm at the bar a lot). Fellow cruisers - although carnival has no control over this, other cruisers on this trip are great. There was an argument on lido one afternoon, security came but the guys shook hands and went about their business in under 5 mins. Bars - so many cool new drinks. Spicy mango Bellini anyone?? Terrazza area - loving my cabana. Have fallen out of the hammock twice. Wish there was a pool and not just hot tubs.
What I don't like so much - lido buffet - I find the layout rubbish. Was on the celebration earlier this year and thought buffet layout was far more sensible. Food in general - it's not awful by any means and wholly subjective but I'm yet to have food served piping hot and I'm finding the MDR menus so so. Terrazza area - needs a gate between the general area and cabanas. Not enjoying the randoms walking past shouting 'oooh what's this, private rooms', I don't want to fall out the hammock in front of them and I don't want to hear loud voices.
What I really don't like - Manhattan cruise terminal. Could've just been this cruise but in comparison to other terminals I've departed from, I found this terminal chaotic. Hoping debark is not the same. Casino - I'm both a smoker and degenerate gambler. You can find the casino by using your nose, the smoke small travels and lingers. I have been in ship casinos with much better filtration. It is also very hard to find a machine let alone one you want to play on at peak times. I also remain baffled why a non smoker sits next to me when I am smoking and produces theatrics when there is a non smoking section (not perfect but at least will not have a smoker next to you) and a whole non smoking casino annexe. Breakfast omelette - no jalapenos! This is obviously what has broken my whole cruise.
And whilst I have not gone myself, queues for comedy shows are always really long. I also periodically smell weed. Doesn't bother me, I'm just jealous.
All in all, I'm loving the ship.