I think maybe since they spent the first four packs adding over 850 new building pieces, they and everyone who doesn’t play the game solely to build things have earned a break from what seemed for ages to be the opposite problem from what you’re describing: what felt like too much focus on building and not enough on the animals. Which are, ya know, what the game is actually about. What you think of as “balanced DLCs” were never balanced; they leaned much more heavily to the builders and scenario players. This isn’t Planet Coaster.
Then up the price and do 8 animals plus building pieces. I'm saying it doesn't have to be one or the other.
You may disagree it's a building game like Planet Coaster but that's just how you play it. There is a large community of builders in the game who get nothing of any real substance now for six months. Then this pack does really well and they decide to do it again and we get to 9 months and so on...
I'm stressing don't leave out a section of the community. I know you felt it wasn't balanced before but you lost out of potentially four animals before. We just lost out on potentially 250 pieces. There has never been a point so far where one side of the community didn't get represented in a DLC. It kinda stings and I'm just representing what may be the minority but it's a minority that exists.