I don't really have a problem with a nonequal amount of same-sex couples. Here's why, if I'm in a restaurant, or at the gym, or anywhere else there are not an equal amount of any single demographic, so I don't feel the need to have them displayed equally. Sims for me is not a counting game, I like having the premades around because they add more diversity to my game mostly with traits I don't often use, but I don't feel the need to count off the demographics of each. That being said, I wouldn't mind more male couples, but that's the same as me saying I wouldn't mind more Hispanic couples.
Edit: Maybe it's because I add my own same-sex couples. I usually add in my own extended family, and adopted families, so it comes out to be a more fair representation, but that's just me maybe.