Yeah that's been the chief complaint ever since Gal Gadot was cast. She's a 5'10 beanpole from Israel, not a 6'0 warrior woman from Themyscira.
I mean obviously 2 inches of height is no big deal, but the physique is a bit ridiculous. I guess they wanted someone who looked somewhat Mediterranean, and Gadot was probably the only one with any recognizability and height. I cringe at the idea of Gina Carano having anything more than a couple simple lines in a movie, much less a major speaking part. Adrianne Palicki would have looked good, but she already failed as Wonder Woman once, and is currently involved in a Marvel project. Emily Blunt could maybe pull it off, she made a great warrior woman in Edge of Tomorrow, but I'm hoping Marvel plans to tap her to play Carol Danvers.