It's mostly that La Bayou has a distinct menu that, barring its sister ship, has items unavailable anywhere else on the line. It's also the premium steakhouse (allegedly), so... yeah...
The buffet is open until 10PM, and the Lido pizza's open until 11PM, so I mostly grab random piles of stuff from there and keep it in my room for late night/early morning food. Room service is also available. A lot of the bars have espresso machines (as opposed to there being only a few on ships that have an International Cafe), so you can get your premium coffees there. There's also a bakery/pastry-ish area at the front of Lido, capping off the buffet.
The main atrium on this ship is four floors, has Good Spirits, at least one other bar, the service desk, both MDRs, and has entrances directly to the library, internet cafe, and whatever the smoking lounge on this one is. (I don't think it was labelled Churchill's, but I could be mistaken.)
I don't know if there were more people dispatched to other hotels-- that was just to the one hotel that had people that was part of the mega-party that I had met.