Given the wide range of pre-med backgrounds, some sort of objective measure is necessary, so I don't believe the test will be going away in the foreseeable future. That said, I know people with incredibly high MCAT scores who I wouldn't want anywhere near me in a white coat
Testing how people respond to stress and how conscientious they are to others in addition to their mastery of organic chemistry seems like a promising direction. I have no doubt that, if this kind of test is adopted, a whole industry based on "coaching" agreeableness and openness will crop up. But it does speak to the recognition that there's more to medicine than the memorization of different SN2 reactions.