Louis XXIV
Le Roi Soleil
The only thing I worry about with the Huns is that nearly all their bonuses affect the early game. They'll become somewhat stale by the modern age. Why doesn't Civ V introduce new trait choices throughout the ages (like Civ Rev) or give permanent game traits that are shared among certain civs? (i.e. US can choose Industrial, Expansionist or Scientific, Egypt Cultural, etc)
That would reduce variety not increase it. There are plenty of Civs designed to have benefits throughout the game. In fact, it's quite rare to find one entirely focused on one era. Polynesia comes close but Moai statues exist throughout. By having the Huns as a short lit fuse that either explodes or burns out, they are unique in the game (and, yes, they can burn cities throughout, but that's only an ok ability).