Someone probably already mentioned it but the bug with quirks sticking around even after they've been removed has been fixed (at least in my game) in a patch a few months ago.
Personally I only really use the BB and CAS items from the pack and ignore the celebrities. They're not massively invasive as far as I'm concerned and I've turned the setting to my played Sims starting opted out of fame. So for me, the pack isn't worth the full value but on a sale, sure. I did play through a Rags to Riches challenge focused on Fame and it was fun, just not enough (for me) to go back to that again. Since you're interested in those aspects though, I think you'll find it a good purchase.
