I'd be interested in this. I'd love for some ways to further customize the pre-existing world. It could further enhance the differences between save games. I'm not sure I care about all of the ideas presented there (I don't want to play as a maid, *yawn* thanks) but there's definitely some interesting ones included like the town customization and interior design career.
A lot of it reminded me of a combination of Ambitions and Town Life from TS3 and I had a lot of fun with those packs.