I have no wish to defend the CAA in this matter, but there is no point in exaggerating the situation. It does not take months to get the results under the current system. It takes between 7 and 10 working days from the end of the exam week. It just seems like months if you are one of the students waiting for the results.
Computerised exams are unlikely to provide any significant reduction in overall training time. Most students approaching their exams wish that they had a little more time to get ready. It is however true that those who fail exams usually want to retake then as soon as possible. It is also true that this urgency is often a mistake and students would do better to ensure that they are fully prepared before any resits.
The CAA have actually considered the use of computerised exams, but are a bit worried about the quality of their central question bank. Some students and instructors share this concern.