You are ignoring the context…
Your argument is that hunter is not getting worse, it’s just a different meta.
That’s factually untrue, as evidenced by matchups that are shifting further out of favor for hunter between diamond and top legend. You yourself point out a loss of about 5% win rate against enrage warrior alone (and this is an effect happening with several decks).
If this skill difference were applied to diamond’s meta, that would drop hunter’s win rate by about .23% overall.
It also encourages people to run enrage warrior more, as it’s a more decisive matchup against hunter, which you see at top legend, where there are almost double the enrage warriors.
I can’t see the exact matchup data for the other major decks because I don’t pay for HSR, but if you were to apply those differences just to the meta in diamond, you’d probably shave at least a percent off of the hunter’s win rate.
Based on Thursday’s VS report, control priest and blood DK are horribly overplayed in those ranges given how bad those decks are, which is giving hound hunter an unnatural boost in those brackets. Less people are clinging to them in top legend, which yes, is hurting hunter a bit.
Most of the decks rising at top legend are decks that can’t rise in diamond because they don’t win enough until people get better with the deck. If you copied and pasted the meta at top legend into diamond right now, hunter’s win rate would likely rise, because it would be comprised of more decks that it is favored against.
You can actually calculate it since you appear to have HSR premium.
Take the win rates of hunter vs each deck in diamond and weight them against the top 1k legend meta.
So, for example, 45 x .1038 for the diamond win rate of hunter vs enrage warrior weighted by how many enrage warriors there were in top legend according to the VS report. Then add them up for the new weighted average.
If you do that for each deck and compare it to hunter’s top 1k legend win rate, it’ll give you an idea of how much of the win rate change is from the Meta change, and how much of it is from people playing differently.
Edit:
Or unholy DK, or totem shaman, or pure paladin, or get good with outcast DH, or apparently naga mage.