FPS drops to 24 aren't that big when the game is 30 FPS native I believe on last gen and current gen. Or at least I think it's 30 FPS native on current gen, I'm not sure. Even CoD drops to like 40-50 sometimes, and if you've ever played zombies, it drops to like 20-30 when playing split screen.
I like to call myself a BF fangirl, I'm very loyal to the games, but even I know the games are slow paced. The most kills I've gotten in a CoD match was 146, in less than ten minutes. The most I've gotten in BF was like 80, in a 15-20 minute match.