I would say that now the pack is working. When Lovestruck first came out, it didn't always work as easily. I started playing Life & Death last week and noticed is that the Cupid's Corner is working, romantic satisfaction and turn-ons/offs are working, my sim can plan and go on dates, and all the romantic interactions seem to be working correctly. I'd go ahead if that gameplay is exciting to you.
It'll remind you of Growing Together because the gameplay is more subtle. It's romantic dynamics, turn-ons/offs, planning and going on dates, and finding your perfect partner. Just like Growing Together had family dynamics, social compatibility, milestones, etc are based on gameplay and interacting with other sims/worlds. If that's up your alley, Lovestruck is for you.