Husbandry issues relating to the day to day care of the animal(s) rather than the design / management / maintenance of the enclosure? If that is the case ( and I am not saying it is as I have no idea how accurate your information is or what the circumstances actually were) then it raises the question as to whether it is of any relevance to this poll. Outside of not voting for a collection on principle - which is a fair enough approach - then I guess we would need more information to know in this instance.
How is whether an animal can survive or not at the zoo not something that should be taken into consideration whether it's the enclosure itself that's the problem? It doesn't many how nice the enclosure is, if the animals can't be kept alive then the zoo isn't doing a good job and the quality of the enclosure almost becomes moot. I don't remember anyone having a problem with this criticism when South Lake's tapir enclosure was criticized for husbandry issues.
For me - I am trying not to let breeding history influence my opinion heavily as I'm pretty sure I don't have all the information needed to understand why some collections have not done well. I believe you can just be unlucky in this resepect with fertility issues and such that are unrelated to enclosure design. Chester's jaguars are a prime example - great enclosure, never going to successfully breed the current pair. Maybe you are putting more weight on successful breeding as a rating factor.
How are animals that are completely capable of breeding until ideal conditions either doing so or not and then a pair of animals where the male is literally incapable of fertilizing an ovary at all comparable, though? Additionally, from my understanding, Chester were breeding their Jaguar just fine until the SSP asked them to stop so your example doesn't follow.
~Thylo