I stayed at the Sheraton Abu Dhabi Hotel & Resort back in March of this year (as a Gold). I upgraded myself at time of check-in to the Club Level. The Club Lounge, however, was pretty small, but it did have a nice selection of finger foods and a fully stocked bar with bartender.
I can't comment on breakfast for Plats since I didn't have that status at the time, but I do remember the club being closed one morning.
The room was OK, but the grounds are very nice and the WiFi worked at the pool bar.