Think about the original heroes, if you will. They are souped up superpowered versions of weak troops. Now, the thing is, the level 5 pekkas are as strong as a hero, and the max dragon is pretty powerful too. Why would you want an extremely overpowered version of these? Also, the other heroes have skills that help a horde of barbarians, archers, etc. What would these do? Summon pekkas? Summon dragons? It would simply not be fair.
-Pride
