Agreed on Divine Focus. That skill is pretty useless right now. It has a long cooldown, high fail rate, and even on success, a high chance to fail immediately after.
If I understand correctly, a "no faith loss" flag wouldn't be equivalent to a DK's impunity flag. Impunity means no loss of class, but you can lose faith without losing class. I'd be fine with an impunity flag for legend paladins, but "no faith loss" wouldn't be consistent with a rose knight's character. Even though it would be less annoying to play :)