I wouldn't mind bigger households (although 13 would overwhelm the heck out of me), but right now I'd settle for how household size was handled in previous Sims games, where pets don't take up one of the 8 slots, but the overall cap for a save was 10 when you add the two together, so you could have 8 sims and two pets, 6 sims and four pets, whatever. It's especially frustrating because you can't control pets in TS4 (which I DON'T mind, to be clear), so having them take up a 'real' slot is extra irritating.
