The Florida Aquarium's Penguin Exhibit was not open when I visited in January 2022, but this otherwise excellent facility had another letdown on hand; the Madagascar exhibit. It features one of the worst Lemur exhibits I've seen (with Riverbanks, Greenville, and Lazy 5 Ranch also being up there) and a few uninteresting reptile exhibits. The only good enclosure was the clone coral reef habitat. Also, the exhibit feels very out-of-place as it's located "above" the Wetlands of Florida exhibit.
Some others I can think of;
Jacksonville Zoo's Australia: Jacksonville is a very high quality zoo (currently my highest-ranking Florida facility), but the Australia exhibit feels like an afterthought. All you get are bog standard habitats for Emus and a bog standard Lorikeet aviary. You can skip it and not miss anything. Granted, the Amphibian Conservation Center is also located here, but it's thematically disconnected from the rest of the complex.
Zoo Atlanta is another elite zoo with a top-notch reptile house and excellent Africa and Asia exhibits, so when I got to the Exotic Bird aviaries afterwards, I was let down by the scattering of spacious, but otherwise uninteresting wood-and-wire aviaries with a decent but unspectacular collection. It felt like quite a sharp contrast from the previous exhibits at the zoo.
ZooTampa's Main Avairy; ZooTampa itself is a hodgepodge of disappointment exhibits, but for me, the one that sticks out the most is the Main Aviary. This large exhibit towers over the main plaza, and it looked impressive. I was very eager to check it out. But once inside, I was sorely disappointed by the lackluster path layout, the large ugly wooden structure at the very center seemingly left to rot, and the exhibit itself feeling very underpopulated. Compared to the excellent walk-through aviaries I experienced that same week, including those at Disney's Animal Kingdom, Florida Aquarium, and Jacksonville, I was very underwhelmed by what ZooTampa had to offer.