Some of the game-changing elements were delivered in the patch, but make no mistake, they were part of the Island Living pack. Off the Grid made sense for the conservationist theme, beach bums and players who wanted to do a 'castaway' theme. Enabling part-time jobs for adults was necessary for the new part-time jobs in IL. Both of these were features many, many people had requested for a long time, and it's cool that they included them with the patch for everyone. The fishing update also came with the patch, and I'm still exploring that, but since my Sims do a lot of fishing, it's made my game more interesting. (Plus, lots of new fish to catch with the pack.)
Personally, I wasn't thrilled about the theme: 'Ocean swimming and suntanning sounds boring - it's like watching your Sim sleep.' Everyone else: 'We must have ocean swimming and suntanning, it'll be game-changing.' Now: 'Wah! Ocean swimming and suntanning is boring. This pack doesn't have enough content.' I didn't expect much and I've been pleasantly surprised by this pack. (I get a kick out of the little things - my Sims can now imitate mermaids as a mischievous interaction, and there's a dodgy odd job in which you 'look for a guy's wallet on the beach', picking up random wallets for the guy. Always good to be helpful.)