I'm happy and I own the patio pack.
My reasoning.
1) I really wanted another hot tub skin and I love this ones design
2) I really love that ppl without the pack can have it too now. This in no way takes away anything from me. I still have what I paid for.
3) I've had perfect patio for ages, even if I had bought the pack for the hot tub only (which I didn't), that's a couple years of game play for $10 (or $5 on sale) I've already had. Not bad.
4) I can't build. Maybe there will be some more houses on the gallery with hot tubs now that more ppl have access to them, haha!
5) Even if I had bought perfect patio for the hot tub only and I had just bought it two days ago for whatever reason... I STILL Haven't lost out on much. As I mentioned earlier, you win some, you lose some. It's a stuff pack and the price of a couple cups of coffee. I bought DU and RoM 4 days before they went on sale and it cost me much more but sometimes you just gotta shrug it off and take the loss. Life goes that way and maybe next time you'll catch the good deal.
6. If it's an item I'd never ever use, well hey, it's easy to ignore and again, that's life. Sometimes you get what you want, sometimes you don't. Maybe next time it'd be an item I would. (Hypothetical as this time around I"m enjoying it)
I DO wish there had been a bit more offered for the anniversary. But I'm also not disappointed with the hot tub.
(On the other hand, usually it's whoever's anniversary/birthday it is that gets the gifts, not the guests haha! But yeah I realise that company's don't and shouldn't work that way.)
Ideally I think a variety of items should have been given out so that more users would have gotten something they would use. Maybe 20 items for the 20th anniversary, even if they were small. Could have been released in a free pack like the holiday pack so that ppl had the choice to download or not even. Maybe we'll get more for the 25th hahaha! It kinda feels to me that they forgot their own anniversary tbh and just threw something together when they started seeing posts.
On that note, I do think there's some neat things coming to the Sims 4 (free babies one day? Just a hunch that they are secretly being worked on haha) and maybe they just have been working hard on those and weren't quite ready to release them yet. I'd prefer them to release when ready than to meet a specific date, so they work properly.
But anyways, yeah: the short answer is Yes, I'm happy with the hot tub.