Currently, all you get is titles for vet completion and a decent dye for speed-runs. That's kinda meh. There's no real incentive to really push yourself and your group in these trials other than bragging rights in zone chat. They need something like The Dynamo, Dro-m'Athra Destroyer, or Immortal Redeemer.
Here's some suggestions.
Aetherian Archive
Challenger Title:
Mage Master
Skin: Spellfiend
Hel-Ra Citadel
Challenger Title:
Warrior Waster
Skin: Mummy
Sanctum Ophidia
Challenger Title:
Serpent Subduer
Skin: Celestial

I threw this together in maybe five minutes. There are probably better titles and better skins, but the point here is that the Craglorn trials need cosmetics.
Inb4 "muh pvp needs cosmetic rewards" (which it does)
unban my first account thanks