Come on, hunter isn't JUST about undertaker. Its dangerous in many decks, and there's been numerous classes incorporating it. Generally you attempt to get rid of it in every matchup, its not that different in hunter. You don't think hounds and skill command are just as instrumental in hunters viability? Putting people on the clock with your hero power, two cheap five damage DD's, and the threat of never letting your board get too big are all working for hunter just as much as the two undertakers. None of those things have anything to do with the "undertaker gameplan". There's tons of hunter matches where your UT gets removed immediately, or it gets stuck as a dead card, or you simply don't get to draw them efficiently.
sKill command, secrets (aside from synergy with UT/Mad Sci, which is really the bigger issue than the webspinners everyone keeps pointing to, and is also present in mage and pally albeit with less powerful secrets probably) the weapon, animal companion, potentially houndmaster and highmane, all are auto include and don't really exist soley because the class is running undertakers.
If you don't think that hunter will adjust their game with the new meta and stay strong but different then you're myopic. Nerfing UT won't kill hunter any more than nerfing Hounds, Buzzard or Leeroy did. Crying about the card is mostly butthurt talk where you're only remembering the outlier matches that UT pissed you off.
You're wrong for a lot of reasons. Mostly, you're just not making much sense, a lot of your arguments are circular. Of course classes adjust to nerfs, but that doesn't change the fact that UT is the only thing making Hunter viable right now, take out UT and Webspinner is fine. The fact that Hunter has "adjusted" before doesn't change that. Hunter has always adjusted via an OP card that has needed nerfed. Which just goes to show how structurally flawed the Hunter class is right down to its foundations. A single card can make or break whether Hunter sucks, or is dominant. Yes, Webspinner makes UT more problematic, but that's like saying a Murloc Tidehunter is the real problem with Murlocs, because it allows or Murloc Tidecaller to be buffed more easily. Obviously Murlocs aren't op, but if they were, the above argument would be silly and it's basically what you're saying with UT.
Undertaker is the problem, it's as simple as that. If it were a case of Webspinner being the problem, then UT would only be seen in Hunter decks, rather than 90% of everything in the meta right now. Yes Webspinner exacerbates it, but Webspinner isn't the problem, nor is Kill Command or Hunter's Mark or anything else. It's a combination of things that allows Undertaker to excel in Hunter even more than it does in other classes. You're saying that nerfing UT won't kill Hunter anymore than nerfing Hounds and Buzzard did, but you're forgetting that every card that has saved hunter has needed nerfed and that if your argument were true, and nerfing UT won't kill Hunter, we'd be seeing other Hunter decks out there right now, maybe not often, but they'd be there.
Just because there are a ton of matches where UT gets removed early and Hunter might still win, doesn't change the fact that UT is the problem. You almost always gain value and a huge tempo advantage when your UT is taken care of early, it's a win/win when you drop UT early. The fact that people are putting in a 2 mana silence (Ironbeak Owl) to deal with UT and that people have the mindset that this is a good deal/trade, just shows how problematic and OP Hunter is. Nowhere in the history of HS has anyone ever said that it's valuable to use a 2 mana card to deal with a 1 mana card. But UT is so OP that in this meta, it is.
I'd like there to be other options for Hunter, but I don't see them coming anytime soon, because as I've said before, imo the Hunter hero ability seriously limits the range of Hunter play styles and feasible decks.