1.17 is released,and I finally updated my nether data pack!
A lot of things are changed and fixed so you can feel much better this time!
[​Features]

  [​Dimensions]

  minecraft:overworld--the Nether,where you start your life.
  minecraft:the_nether--"Second Nether",an empty dimension that can be used as a hub.
  minecraft:the_end--Nothing changed.

  [​Necessary Mobs--Places]

  Witch--Crimson Forest
  Zombie Villager--Nether Wastes
  Pillager--Soul Sand Valley
  Slime--Nether,slime chunks&Y<=40
  Wandering Trader--End Highlands

  [​Caves&Cliffs Features--Places]

  Amethyst Geode--Basalt Delta
  Ore Vein--Nether
  Noise Cave--Nether&"Second Nether"

  [​Little Lovely Changes]

  Coral fan and snow appear on end ship.
  Stronghold spawns in the nether.
  Phantoms are automatically removed though they still spawn.
  You can use a custom seed now,after loading both files.
  Respawn Anchor works now.

[​Usage]

  Load both the data pack and the config file while generating a new world.

[​Tips]

  If you spawn above the ceiling,change the seed and try again.
  There is a hidden advancement.Can you find it and achieve it?

  [​Recommended Seeds]

  1856149595730609046(spawn on a float island and lack of food,but very close to bastion and fortress,a good seed for challenging)
  -1954866540756641686(spawn at a corner,very close to bastion,fortress and ruined portal)

  This section would be updated dynamically.
  If you have a good seed,share it in the comment.

[???]

  I have to say,1.17 changed much more than I thought!