I guess I'm in the camp that's still not convinced that the SEA pack really was any more buggy than other packs. I just think that the anger from the building side of the community was so great at the time of SEA's release that it cemented disproportional impressions and stereotypes about the pack that still influence our thinking today.
That's not to say there weren't bugs or things that could still be improved. That is true of every pack. But when I compare it to the aquatic pack, for example, where animals would swim through land to escape their habitats, and then remember that the extremely buggy first attempt with the educators came with that same update to the aquatic pack, and that it was this same aquatic update where the multi-select tool for the franchise trade center was rolled out and then actually had to be recalled because it had so many problems --- Against that backdrop it's hard for me to claim that SEA was more buggy than what came before. Or to hold onto the idea that doing an animal pack made it more rushed than the prior, initially incomplete, work done on diving or educators or the trade center.
For me, what is different isn't the quality or the speed, but rather that a narrative formed that SEA was bad because it was the first pack that didn't have pieces. Then, all of the pack's bugs got attached to that narrative -- even if they were actually the equivalent of the bugs that exist in any other pack! But because the narrative had been built that the aquatic pack was good we tend to ignore or forget all its bugs -- or at least, don't associate them with being problems of the 'pack" --, while because the narrative had been built that SEA was bad we still continue to think of it as a problem. Even though more players have gotten used to the idea of animal packs in the interim and may no longer wish to associate themselves with those original reactions, the early damage still persists in the way the community thinks about the SEA pack, and the very fact that we associate bugs with the pack at all, while thinking of other bugs in other terms.
Said another way, if the aquatic animals had been the first ones without pieces and gotten those angry first reactions, then today we'd be speculating on why the aquatic pack's diving was rushed and is still so buggy. And if the binturong, malayan tapir, dhole and clouded leopard had been released as part of a pack that had been a builder's delight, we'd have long forgotten the ones that were fixed quickly (just as we have for animals of lots of other packs), and would couch ongoing requests for udpates as requests about those animals individually, rather than associating them with the whole "pack".