I wonder what abilities they are, and if some were baked onto Evoker.There is no getting behind their heads because it's always inconsistent and based in their current choice of direction.
How they designed X class back then might not have rhe same design goals or limitations as today. It's all on a whim as far as our perception of design goes.
Like Dark Ranger becoming a Hero Talent is likely salvaging a scrapped Class that they couldn't get working in Shadowlands. We've seen the cosmetics and boss abilities and everything suggesting the possibility of a scrapped class concept. And they possibly decided Hero Talent was the way to go. No one could have gotten unto their minds to see that as a possibility. To us, it's all whims of change, a direction we could not anticipate.
Tinkers have been so long expected and so long held back that they could be literally anything, possibly following no pattern or precedents at all. That is why the Survey suggesting Titan themed Tinkers isn't all surprising.
And that affects current classes today being opened up to more races. They have given up on keeping consistent, coherent lore for the sake if adding customization. Most new Warlock races still don't have ample lore covering the choices