The cap itself doesn't bother me, I'm sure greater minds than this tiny glitch have their reasons. What I don't understand is why the highest level (and the 'buff' levels) are not prime numbers! It just seems against the will of the giants, you know?
Unrelated, but I had completely forgotten about the amazing whistling tune in the tutorial! I for one would not be sad to hear that song around the rest of the world sometimes.