I guess it's a matter of taste, I prefer Mars and Mercury over Jupiter and Venus. I do see there is something fanarty about Mars, especially on the bottom, but her face looks gorgeous. The character design we see in the leaked material is quite the opposite of what Naoko did in the manga. It's too round and lacks that edgy aspect. At least, the proportions are done right.
That's why they are copying everything from it. Anything other than that will fail miserably. We've seen it in seasons 1,2 and 3.
It is not that difficult to understand.