I honestly would not have been that cool with it. It would be imo better because we would have had at least one complete race but they would look way to different to make them feel like one race at the same time. Lets not forget that until the age of around 13 they are allowed to live in the village because they look like the females. I would find it hard to believe that they would turn into hulk like beings after that. The difference between female and male Au Ra are already quite big and there its mostly just the height. A hrothgar viera would be even worse with being even bigger than the females and looking much more beastly and wild than them. This would 100% fall into the: The females look like models while the males look completely different and beastly -trope...which is something that I dont want.
So it would have been better than a genderlock but still would play too much into the common trope of the men looking like beasts while the females are only allowed to be cute/sexy. I dont care if they have more or less muscles (even though I wish we had a more slimmer race) but please let them at least look like they are belonging to the same race at all.
Edit: Can someone tell me what exactly a conventionally attractive man is? Because isnt that depending on where you live? And isnt that changing all the time too? One time you have all these manly hairy men with big muscles and big beards other times people find men more attractive that are clean shaven (on the whole body) and less muscled. Heck there are even studies that show that women also can see someone as much more attractive if they are are simply successfull. So I doubt that there is a universal conventional idea about men.
In the end Yoshida and his team will be doing the decision. And they are from Asia, who might have a slightly different view about what makes a man look handsome. This is the same culture where slim, boyish idol groups are loved, and even Yoshida himself looks much more like that instead of the more "western" view of a man. (But even that would depend on where in the western world you would ask, and who you ask)