I mostly meant decor. I can see Disney leaving more of the current design elements if they intended to leave the ship in China, even if it wasn't quite the look and feel of the existing DCL fleet. I feel that if they want to bring it to the US, they would do a more extensive overhaul of the visual elements.
Thank said, they probably need an extensive overhaul either way so you are correct, there wouldn't be much different to do to the ship depending on the market and if they are smart they would make it more multi-purpose to hedge their bets on future deployments. Just as you mentioned the Ovation (and now also the Wonder of the seas) there are many ships originally intended for China that are now in the US, do DCL would be silly not to make this ship able to serve multiple markets.
I am eager to see if there is any truth to this, and how extensive of a gut/rework they decide to do. Also consider, this ship would be a one of a kind. Most lines build multiple of the same ship for a reason, save $$ on design costs. There would be an awful lot of theming, design, rework, etc that would only result in a single ship here. Unless..was the Global Dream 2 actually scrapped yet?