Yes, I agree to an extent. KL Rahul has established himself much better than Umar Akmal had, but my comment was in reference to your criterion of judgement, which was solely on potential. On raw potential there are many other batsmen that are more gifted and more dynamic than Kohli, Root and Williamson, but who tops the batting charts? Batting isn't just about hitting pretty shots, but also consistency and mental rigidity (ask Imran Nazir or Maxwell).
That exactly is my point. KL Rahul is a great talent and I believe he will become a great player, but with the technical glitches inherent in his batting technique, I don't see him becoming better than Babar. Babar is most likely the best batsmen in the world aged 24 or under, the comparison is unfair on KL Rahul in my opinion.