Also, threads like this really highlight a serious issue with this community.
Stop looking at things as either/or. You're all acting as though the sheer act of wanting a Sumatran tiger is going to make Frontier go, "Let's scrap this entire Bird DLC in favour of this tiger!" or something stupid like that. Imagine if I reacted that way to every animal I didn't care about being added to the game. We've already had a ton of wasted slots by my measure - the Arctic wolf, dingo, the entire North America Animal Pack was a waste to me, the dhole, spectacled caiman, Cuvier's dwarf caiman, giant otter, even the fennec fox - these are all species I didn't give a damn about. I'd take a Sumatran tiger over any of them.
Point is, always assume a wishlist takes place in a perfect world, where support is never-ending.
Edit: The question isn't "Would you want a Sumatran tiger instead of ____" it's "Would you want a Sumatran tiger full stop," as in, "assuming you're not going to lose anything else".