TG lied to us and told us this Evil-Lyn would have her 2000x dress and THIS Evil-Lyn was never in the vintage line we got that Evil-Lyn already
I wouldn't necessarily say that he lied about it, just that he was in the wrong. Toyguru is not responsible for sculpting the figures, and regardless of what he said ultimately the figures' look is entirely up to the Four Horsemen.
Filmation Evil-Lyn had a unique dress too, but if Mattel had made a cartoon coloured Evil-Lyn back in the 80s I bet she would have been a simple repaint with a fabric cape. As would 200X Evil-Lyn, had she existed back then.
I assume that's why they chose to "Classicize" 200X EL in this way.