With all of the negativity coming up around the game, it feels like they took the parts that people wanted for Sims 3 (Talking in groups in rooms, multitasking, some customization options, better social and emotional interaction) and finally put those into the game, but took out everything that made the Sims 3 what it was (Open world, a neighborhood that felt alive, more life cycles, pools, creative capabilities) as if they weren't important. Or, for a number of them, things that they can sell later as overpriced expansion packs.
Sure, the Sims 3 ran like a pulsating pile of garbage when you installed every expansion pack, but that was just because it was a patchwork of badly optimized code. Instead of actually sitting down and figuring out how to make the game run faster and more smoothly they said, "Screw it! We'll just make it so simple it can run on a tablet if you dumbed down the graphics enough" and called it a day. And they can get away with it because 90% of their target audience don't have the computers to run anything more complicated than solitaire, much less a modern 3D game with lots of stuff going on under the hood. An open world is hard to optimize for a game that'll inevitably be so full of memory leaks and performance issues by the end of its life cycle five years from now that they decided their great big piles of cash weren't large enough to work on fixing those issues, so they avoided them completely instead.
They know their audience, and I'm pretty sure most of the people here on the forums are not part of their target demographic, as much as we'd like them to cater to us. They're going for casual stay at home moms, kids, older folks who google their email address to check their mail, and people looking to escape from their stressful work life for a few minutes before going back to doing double shifts. The kind of people who wouldn't know the difference between a GPU and a CPU if it was tattooed to their retina.
This isn't necessarily a bad thing for most people - The result is that the target audience get a product that's certainly not good, but it's enough to satisfy them. The hardcore gaming community won't be nearly as easy to please, but EA won't listen to them over the sound of EA selling their bi-monthly content packs and expansions to those who see the game for what it is, not what it could have been.