First of all, asking whether games "need" something is not the right way to go. The only people who can decide what a game "needs" are the developers themselves.
Second of all, ask whether the time and resources needed to get the feature you want would be worth it in the end. How many people would it appeal do? Does it justify the time and expense needed? There are tons of games/game features/character designs that I'd personally like to see, but I know they'll never be made because they wouldn't appeal to very many people beyond me.
Third, regarding "variety". A game can always have more variety. No game will ever appeal to absolutely every single niche/fetish/etc when it comes to character creation. There will always be some group that says "Hey! What about us?". People need to stop being so obsessed with trying to appeal to everyone. Trying to do so just waters down everything else. Choose who your audience is, and focus all your efforts on them.
As for "beefy" women specifically:
Thing is, "beefy" can mean many different things to different people. Someone on the previous page posted a pic of a female Olympic weightlifter. Frankly, I found her repulsive. On the other hand, I also appreciate most fitness model-type physiques. Basically, I'm okay with visible muscles on a woman as long as she still has a distinctly feminine body shape. When I can no longer easily tell that a character is a woman, that's where I draw the line.
Personally, I have to wonder whether the people extolling "beefy" women are genuinely interested in them, or are only interested in them because they're different from the norm. Lately, it seems like a feature or design that "goes against the norm" in some way has become a positive quality in its own right. "Unique" does not automatically equal "better". A game's feature or design should be judged solely on its own merits, not whether society or most people in a given group like it or not. I've seen several feminists say that a certain female character design is "good" solely because she "doesn't give most straight guys boners". Yes, they said that in so many words. If you're judging a character by how much a social group doesn't like him/her rather than how much you like him/her, that's pretty messed up.