I was able to find a company that did some interior work (see pictures from their linkedin) on equinox during this dry dock. They are called Ready2Sail. On their portfolio they list some turn key projects (see picture) including Equinox. According to that list they did: CARPET AND TILES INSTALLATION IN OCV, MDR,
CELEBRITY CRUISE LINES ENSAMBLE ENTRANCE, TUSCAN GRILL AND CELEBRITY CENTRAL
EDIT:As mentioned in the linkedin post they also replaced some stage flooring.
Sadly so far I was unable to find any details on what if any work was done to the cabins. I sure hope they have been refurbished to reflect the standard of Silhouette. From what I have been seeing most of the cabins are in a horrible state between to styles and worn down. Anyone find anything else?
Another video I found showing some of the outside work done: https://www.facebook.com/reel/979725683589407