They really just need to go with sculpted. Rooted hair is hard to do even by the veterans of this hobby.
I also prefer sculpted hair. Its very rare I see a figure with rooted hair that I actually like.
I like rooted hair when its done right. Of course... I like my G.I. Joes with life like "Flocked" hair too!
But I'm practical... it needs to be the right tool for the job.
Examples of rooted hair done right include pretty much any Hot toy entry... Black Widow and Cat Woman are very nice. I also prefer my POTA Nova to be rooted... actually... I guess I think it shines when used on Women... but if its something pretty complex, the sculpted seems the better way to go.
I kinda think the Kahn works because its supposed to be wild.. but I would agree that Georiou's style is sufficiently complex that it needs to be sculpted.,