I know not everything can be translated 1:1. But if in the cases it can, I don't think removing things "that could be considered redundant" is the right approach if you want to have correct translations.
These decisions naturally crop up all over the place during translation. It feels pointless to make blanket statements like you did about the removal of “watered down”. Without knowing that specific language intimately, I can’t say that it is wrong, and this is a very simple case.
Good quality translation will always be somewhat subjective.
It's a genuinely hard problem. Even the idea of "correct translation" is slippery.