The Question of the Day is a way to facilitate community discussion to help members ponder the unanswered questions of the world that are somehow relating to the hobby. Questions are many times open ended and up to interpretation. Feel free to post your thoughts in as much or as little detail as you’d like.
Helpful Considerations may or may not help some people focus their answer, these are blurred to not bother those who have their own ideas.
I think this is the issue with Ditto transforming into any Pokemon yes. Once transformed you cannot tell which is the original Pokemon since Ditto can do a perfect copy.
There was one particular ditto in the anime that unfortunately could not get the faces correctly and would just look like lines. Regardless even a proper ditto would look exactly like Quagsire.
I realize now that this is a boring answer! So poke it with a stick maybe?