A handy feature would be a couple attributes on the test case record that I wish to fetch from the api:
FailingSince - date of failure since last pass on the test case
FailingCount - Number of failures since last pass on the test case
Having this at the test case level would save a lot of time in fetching and elimination of additional network traffic to calculate these figures
Practical use of having these attributes is to notify QA and Engineering when certain defects related to test cases are not being fixed in sufficient time frame.