First of all, balance is a dynamic dynamic process that changes with casting. That is, the line outside of the reel varies with the cast so starting with a "balanced" rod with all the line on the reel gradually becomes "unbalanced" as we cast the line.
Once that line lands on the water, the portion of the line that remains on the water no long pulls down on the rod tip. So the perfectly "balanced" rod with all the line on the water now has less weight on the reel and is relatively tip heavy.
Now consider the situation where we need to high stick short casts with only minimal or no fly line out of the guides. We are holding the the rod tip up. A rod that balances perfectly, eg, parallel to the water now has to be forced tip up constantly. In this case a tip light rod would be easier to fish and less tiring.
So the requirements of perfect "balance" change not only with the cast, but with how you are fishing.
Furthermore, the balance point relative to your hand changes by where you hold the rod handle. Hold the rod further back with the back of the hand against the reel and the balance point moves forward relative to your hand. Hold the rod way up at the top of the handle and the the balance point moves back.
For me balance is a carry over from the days of spin fishing where the line is essentially weight less and the balance point stays the same no matter how long the cast. With fly fishing the balance is dynamic; it constantly changes during the cast, and is different after the cast than before.
I like light rods and light reels. I use the standard Evolution 2.0 which is even lighter than the Evo II on a 10 ft GLoomis GLX classic and it fishes fine for me.
For me balance is no big deal unless there is a gross abnormality.