Sadly, the test is quite luck-based, I know of many people who have claimed they got lucky because the questions they struggled with didn't come up and passed first time. I personally failed my first test (40/50) as hardly any of the questions I had revised came up. To further prove this, I looked at my previous results on my mock tests on the 4 in 1 app and passed around 80% of the time easily (including my initial attempts before revision), I also did 6 more mock tests just after my actual test (each in 10 minutes or less) and still passed every time.
The points per question should be between 1 and 4 based on how accurate the answer is because there are definitely people who do not know anywhere near as much as people who failed and still passed because they have a 1 in 4 chance of guessing the correct answer. Whereas someone who gets the answer wrong but knows the answer is between two options get 0 marks.
They also have clearly made it harder as the pass rate has declined every year to the point where most people who take it fail.