The photo from Spa Day is IMO a joke about ironing out the kinks. I think it could be about any pack. I like Spa Day and I like adding new features so hopefully I'll be happy with it. I remember voting for an update for Outdoor Retreat. I would guess that and Del Sol Valley are probably the most requested aside from supernatural updates.
Dine Out needs major bug fixes. If they want to modernize Dine Out though, I'll be happy. I mostly use the pack to add restaurants into worlds but it has been buggy.
Spa Day added features that I use a lot and I like having playable spas. The Maxis lots that came with were good and I still use several.
The pre-made update is more for other people than for me because I don't focus on that but some players do. I'm at a point at which I am almost playing without pre-mades at all. I added some from GT when I started playing but they have mostly died out or are elders at this point. If I play any new games, I'll probably make my own sims.
As long as updates don't "break" the game for me, I'll be fine. Higher bills are more for other players than for me, for example, so I sometimes use cheats now that bills are higher if the billing seems excessive to me. I say that because they increased the cost of bills which was more for other types of players than me. Rags to riches is a very valid playstyle and I've played it at times but not always or even most of the time.