Alternative theory, just to share a different perspective - they may have considered it at the time, and decided it was worth it.
Then, later on, after having everyone playing on it and lots of changes and new troops and content being added to the game as well as feedback received, decided it was something that needed to be changed.
We do have to regularly rebalance to account for things not being the same as when they released because the game is turning 10 this year 
What was released in the past doesn’t all work forever.