It's cheating, which is indeed harmless in a single player game, but I fear it will lead to bad design decisions if such things are considered options instead of cheats.
I'd rather they don't consider it to be an option that might be enabled so they think to make creatures' appearances give clues about their stats.
I really agree with doing it this way.
I really love the idea especially for those that want to live a more immersive experience.
You don't see it,
but you can ENABLE it.I think it's important to have such option for those that don't want to "die and retry" but