Thanks for your feedback, can you tell us who you'd like to see content with?
First of all thanks for the answer.
To answer your question, basicly human Kerrigan with Zerg would be the way. I get the appeal of her body getting corrupted and get more used to the zergs, but actually changing visually isn't my favorite thing, it somewhat loses her feminine appeal. For example, a woman can't get impregnated by a different species, but if she's infected she could.
Again, this is just my personal opinion, I don't want to shit on the dev neither I'm disconsidering other player's tastes, simply it's mine. Queen of Blades visual removes her feminine and "cute" appeal, I've always liked the association with "primal" sense, of a male being dominant and a female being submissive sexually.
At some point I've considered to patron the game due liking Starcraft in general, and the art is quite nice, but the amount of content Stukov had threw me off, sorry. And this even isn't because he's a human instead of a zerg, but because he as a character doesn't add much and isn't well written imo. Even visually is probably one of the characters that I dislike the most along with Lizzara.
But again, personal opinion. I'm not expecting that the game goes along with everything I say, after it isn't even me who's having the hard-work. But I need to be sincere in my take since you asked. Good luck on your project though.