It's quite difficult to know how far and where will El Canelo reach his "peak", there is often lots of hope built around young fighters, sometimes real, sometimes for the sake of promotion. We don't know yet how strong mentally he is but for the moment being, I think that it would be unfair to downgrade what he did, especially as he is only 20 years old and a long of maturity to buckle under his belt before we see the full potential (disappointing or not) that he has to offer.
I think that what he did so far is great, now let's see the man grow up and show what he has for what's coming next.