Which was the point. The first season of WW on TV was meant to be just as big a superhero spoof as Batman, which meant they didn't need somebody that actually looked like a wonder woman. They just needed somebody brunette and pretty with reasonable enough command of english that she could memorize her lines.
Which is the same mentatlity they seem to be using for the new film.
That first season might have had it's campy moments, but I still think they were clearly going for more of a straightforward adventure show than a Batman-style spoof.
In any case, I certainly see Gadot having a stronger and more intimidating screen presence than Carter ever had. Gadot can be both sweet and badass, but I don't think Carter could have ever pulled off the badass thing.