I have both packs, but I am not sure what is fixed and not. I had few problems with either, but then it's a while since I played them in detail.
I know there was a problem with a restaurant chef just hanging outside, but it could easily be fixed by "reset sim". It has since been fixed in a patch.
Recently I sent a couple to dine out, the restaurant was semi-packed and everything went quite well. Maybe it took a good 4 hrs, but as long as they start the visit a bit early, I don't mind if it takes all evening.
For weddings I never intended to play a wedding event with that much focus on details, so my weddings normally have just a few of the possible features. Then it works out quite well. If you try to pack all options into one event, I think you will be asking for trouble. It's a steep learning curve, and I prefer focusing on other sides of that pack than throwing the perfect wedding anyway :) I like the pack, and especially if you also play celebrities, there is quite a few items/features to use outside the wedding event. I think the pack has been patched once, but I wouldn't be the right simmer to judge it :)
For both packs I think some reported problems might be caused by the lot. They need space to do certain things, and how stuff is positioned might even affect the effectiviness of a restaurant.