Ignoring her regen, her DF hax are pretty impressive and would be incredibly useful against any fighter. Especially since she has solid reaction speed able to react to brooks attacks (which are quite fast) and Jinbes simultaneously.
Her speed and mobility also are pretty great being able to easily weave her way through the ship
Overall I think commander level is fair. I’d say currently capping at 1 Billion Bounty level
I think her arrow wrap around ability is going to be tough to deal with. It feels like it can end a fight in an instant.
And she was also seen piercing those gigantic beasts in the Underworld, means she's lethal aswell, especially when she covers those arrows in haki.
That arrow path ability gives her great mobility, even if her opponent is flying she can reach them.
And it looked like she was using awakening in that one scene against Loki, so it will likely lead to a Doffy esque "ever white" type of ability, where she spawns a multitude of arrows from the ground and if all of those can have different "abilities" - redirecting, pierce through, movement bind etc. - she might end up being a better man's Doffy.
Sommers also looks very promising. Those paramecia awakenings sure are annoying as fuck. And his gigantic thorn sword prolly packs a decent punch.
Will see