So 2nd round distribution only 1.76 + 1.76 = 3.52%, as compared to 10% the first round. This way it will take 20+ more rounds to distribute all the byteballs, looks a pretty slow distribution...
It was only 1.76%: 1.76% of the total supply, which is 17.6% of the available supply (bytes in circulation from the first round). Now we have 11.76% of the total supply in circulation.
We don't know how many bitcoins will be linked in the future and how the weight of bytes will exactly evolve (it's supposed to be more and more relatively to bitcoin) and the rules might completely change after the 3rd round, who knows. In my opinion, a slow distribution gives time for more people to join in, and for users/devs to develop applications around bytes and blackbytes before all the supply is available.