I only had one problem with this exam and that was the trick question that was not given as one which would of made everyone fail the exam.
For the list of things that I would like to see happen for and in exams.
1) Questions being based on the game's lore and not on a TV show that not everyone would of watched.
2) A place where players can train their minds and not only their body for the exams, (namely a library which have lots of informations about the game, such as distant history, past events, event winners, missions, jutsu types and combinations, masterys and their pros and cons, mobs, locations on the map and even places of interest just to name a few.
3) Stages that require smart use of jutsus that's doable by every mastery.
4) A PvP mental elimination stage whereby players race against each other to see who will go on to the next stage by just solve puzzles or passing obstacles faster than their opponents.
5) A random event that puts a stop to the flow of the exam which will now test players ability to adapt to different situations that may even give them the rank of chunin based on their performances.
That's just a few that I can think about now, I know that not all of them can be added to the game but this is my list so if anyone have a problem with it, make your own.