I considered that, but there's two things:
1 - this is true for all the top teams each season, so as long as it's across the board, it's fine, because...
2 - a "balanced" team isn't simply a 50/50 run-to-pass ratio, it's lower than that.
Plus, as the "run heavy" moniker for a team in my game is simply what the opponent's defense is playing the percentages against in its play call in solo play, it makes sense. If you're playing anyone, your goal is most often to stop the run first.
If all of that doesn't suit someone, I'm fine with it, as my game is designed to not have all the tangents and branches a Strat-o-matic or APBA does.