During our trip, we missed out on exploring the dive sites in Grand Turk, South Caicos, and Salt Cay, each of which boasts multiple well known dive spots.
In 2018 I did a trip on the other liveaboard, the Aggressor boat, which gets similar, usually quite positive reviews. Researching for the trip, I discovered the info.
@scubadada listed regarding usual dive site itineraries, and this apparently holds true for both boats.
I'm not weighing in pro. or con. on their selection. My point is people new to the area hear or read about going to 'Turks & Caicos,' and understandably might think they're going to literally dive 'Turks & Caicos.' Nope. Probably not. You're gonna dive Caicos. If you want to dive 'Turks,' you're probably looking at a land-based trip to Grand Turk.
You mentioned vibrancy in one post, I think. As compared to my liveaboard trips (one each) to Belize (2015) and the Caymans (2016), I do think T&C's reef wasn't as vibrant looking (that's been many years and a hurricane ago, granted), but T&C liveaboard diving tends to be on walls that start deep, whereas Little Cayman, for example, has a lot of shallow wall diving where color pops given how sunlight is filtered by the water.
It's had to make everybody happy with food. Some dislike going to foreign destinations and encountering 'burgers & fries,' etc... Some don't like strange, exotic foods. I wouldn't be surprised if a liveaboard operation wanted to show off a bit on food, because people commit to being trapped on the boat roughly a week with no other food options.