Thing is Spiritwalker Twisters kinda look clunky, cause to spend feathers you have to dodge roll, but if you dodge roll out of your prepared whirlwind, it blows up so you need to prep another, and generally speaking it means have to dodge roll everytime you do your twister, it's just unnecessary command bloat(not sure why you don't just fire feathers automatically).
And at the end of the day it's likely just worse than Deadeye regardless, with the added clunkiness.
Spiritwalker in general looks kinda eh, I was tempted to go companion with the boss, and I might still do it depending on patch notes, but it looks pretty bad versus just doing a traditional minion builds or disciple of varashtra. The bosses are likely to be super gimmicky and only useful for boss fighting due to long animations, hard to scale damage due to their varied damage types, and companion builds currently look kinda iffy in general because of the tree travel to get a way to make your weapon add reasonable damage to your companions(Giant's Blood or Lord of the Wild for 2H weap damage). Currently I'm more looking towards just doing Disciple of varashtra summoner if it's not nerfed into dogshit and see from there.
Obviously still waiting for tree and notes though.