Personally, I'm very excited to hear that we will be getting more time with TS4 because I really enjoy playing it.
Don't get me wrong, I can fully admit it did have a pretty rough start with the tons of the missing content from the base game. However, I feel that the Sims Team did a great job patching in a lot of the missing; which make the game feel much more complete to me. The addition of toddlers really resolved the majority of my concerns with TS4. I've got my fingers crossed that they will also patch in Burglar and Firefighter NPCs before they're done.
For my playstyle, that's the only things that makes the base game feel slightly incomplete still.
