Right now you can choose number of questions per test category so that not all students have the same questions. However you can not see results by category. You can see individual results by standard but you can not pick the number of questions for each standard. It would be great to do both, see percentage/points each student received based on category in addition to being able to select number of questions per category. It would also be nice be able to choose number of questions by standard in addition to see the how each student performed on each standard. On another note, it would be nice to be able to drill down in the test statistics to see which students answered a specific question correctly and which answered the questions incorrectly.
As part of the new test tool we are also looking into improved reports and export of result. This would probably cover some of your ideas. Unfortunately, there are other aspects of the new test tool to that we need to develop first, but we will get to the reports after a while.