I get how that could give more strategy to the battles so the player has more control over it. However, we like the idea that all in this game is based on RNG (the dice you are getting, your rolls, the enemies, their damage, etc...)
We like this not only because it is related with how dice work IRL, but because of the thrill it gives, now knowing how hard the enemies are hitting so you have so block to prepare yourself for the next turn, having luck and surviving because of the enemy low rolls, getting one very good dice at the start or getting a very bad one that will make the game harder at the end because you were to confident.