Get a JC diploma

Before, how do universities identify students who are the cream of the crop? Answer: They look at the student's grades.
Now, how do universities identify students who are the cream of the crop? Answer: They look at student's achievements outside his studies.
With more and more people achieving As for their A Levels, it is more difficult for universities to select the best out of the best, as the place is limited. Now with JC diplomas given out to students who are exceptionally good in certain areas, it allows universities to have a better view of which of the students are the ones that they need.
However, even with the JC diploma, I do not feel that it can completely replace A Levels altogether. This is because the purpose of A Level is to test whether a student is prepared for the examinations and whether the student can graduate from JC.
To start off, it is a fact that one has to have good grades in order to get into top universities. Universities want all the top students studying in their institutions so as to boost their reputations and also to attract all the best talents to their universities. The A levels hence is a verification of one’s concepts that one has learned in school.
On the other hand, the JC diploma is a guage to verify the student's achivement other than his studies for example research and electives. However this cannot replace A Levels as the JC diploma is used more for scholarships and universities when everyone is as good as the other. Only during such situation can JC diploma be used to separate the cream of the crop from the rest.
Hence, I feel that JC diploma cannot replace A Levels and can only be used to compare other achievements with equally good students.