Timetable? Within the current year at a guess.
'Could know / should know / must know' has certainly been applied. Also an end to an incorrect answer to one question automatically leading to incorrect answers in others. Gone too will be the style of 'The answer is a. 1&3, b. 2&3, c. 1&2 or d. 2&4'.
The Authority invited a wide range of participants when the original project was initiated; however, only a few of us have stayed the course. I haven't personally written any questions, but every single question submitted by authors which have passed initial filtering have subsequently been reviewed by a joint CAA / Industry panel of current and retired GA instructors.
The leaking of questions to external question banks has been a thorny issue and was one reason why an e-exam was preferred. If that cannot be achieved and the new questions are printed, we have asked the CAA to consider prosecuting blatant plagiarism under infringement of copyright. But there should be no incentive to cheat, as the new exams are intended to test essential knowledge, rather than trapping with daft questions about the local time in Bombay or whatever.