Is Healthy Balance Adjustment Impossible?

In my recent forum post, "Should Ash Keep Her Dash?", I argued that the current unbalanced environment is narrowing player choice and tactical variety. Some comments on that thread suggested that achieving a healthy balance in this game might be impossible, so I would like to hear the development team's opinion on this directly.

I want players to be able to enjoy ranked content with their favorite characters. I believe an ideal character pick rate would be somewhere between 2% and 9% for each legend.

At the same time, I don't want to ask the development team for the impossible. Twenty-seven characters are a significant number. If you genuinely believe this is an impossible task, please let us know.

If this question is bothersome, feel free to ignore it.