I personally loved both packs. I said the Arid pack was my 4th favorite, and I would say twilight is about 8th. Maybe it will be 9th after Oceania? If I were recommending packs for new players, though, I would not recommend either pack for the valid criticism people were giving.To be fair, it definitely felt like that at the time the arid pack was announced. People were heavily dumping on it, with ire I have yet to see in such amounts on this forum.
And most interesting, I remember I did check the posts of the most vocal haters of the arid pack. There was a lot of intersection between vocal haters of the arid pack and staunch defenders of the Twilight pack, despite both packs having the same complaint of over focusing on a single group and region, and not living to the potential of their title. In addition, many of the arid pack haters were vocal supporters of stuff like the ABB, EBB, wisent, eurasian wolf, while actively dumping on the first pack to touch a largely empty region in the game because it is of no interest to them*.
So yes, it definitely felt like regional bias and entitlement, at least from some specific users.
*not saying anyone who wants more european or american animals is entitled, just pointing out the double standard that was prevalent when the arid pack came out.
Twilight did not have enough requested animals, and it seemed a bit too heavy on the North American end. If that's for you, great, but I understand some people not being happy about it. I think my regional bias let me love the skunk, but it also made me hate the raccoon. I'd say they balance each other out. I'm happy we got a pack that featured plenty of small mammals. That was a hole in the base game roster.
The main reason why I would not recommend the Arid animal pack is because it doesn't offer as much gameplay-wise as other packs. It includes 4 mid-sized ungulates from arid regions of Africa, which is already covered with some choices for variety in the base game. Also, non-caprine, mid-sized ungulates tend to have pretty simple enclosures. I was actually very happy North Africa got some representation, and I did think it was lacking. It does add an African rhino for those who haven't gotten one yet, and the sand cat and porcupine are cool and different. I love having these animals as choices for African sections. They are pretty common in zoos and important conservation species. I love it.
The Oceania pack's main draw for me is similar to Twilight's; it has a lot of unique small critters. None of these animals were in my personal top 25, and I'm still a bit sad about the missing tree roo and echidna. I still like the pack though, and I'm really happy Oceania, and especially New Zealand, got some much needed stuff. I'm also happy for all of the people that wanted the devil, and seeing the community happy makes me happy. It looks like a fun set of animals to build for. Yay, more critters!