Honestly, it wouldn't surprise me if WDW agreed to temporarily cut extra doors between some players' rooms for this event, if that were necessary to keep the league happy. The value of this contract is enormous, both in actual hospitality revenue and in ESPN television value. They are at WDW for the athletic facilities; the hotels are rather secondary. If you have the money and the human resources to deal with the logistics, it is quite easy to temporarily improve the ambiance and guest experience at a hotel as long as it is generally in good repair, and Destino Tower is brand-spanking new.
Disney will absolutely change out the beds and bedding for the players' rooms, but they could easily go further for the biggest star players; changing out shower heads, light fixtures and TVs, swapping in nicer tables and chairs, adding game systems and even redoing floor/window coverings, What I suspect is most likely (for players who don't score one of the limited number of suites in the tower), is that they will be given connecting rooms with the bedroom furniture removed from the second room, with it changed to being furnished as a parlor.