Good potential conflict...but GLW delivered the lines like she was reading them off of large off-camera cue cards. Every time she opened her mouth in the episode she delivered her lines with all of the talent and finesse of an understudy in a high school drama production.
You know, at the risk of defacing some sacred idols, I've always thought a lot of the acting on TOS was over-the-top. Not Nimoy, but certainly Shatner and others. I see from her IMDB entry that Whitney hasn't had many film acting roles since the sixties, mostly more Trek. It's possisble she was out of practice, or that she was simply acting the way she had learned how (having never had the chance to mature as an actor), and that was jarring to audiences unused to 60s-style performance. (Personally, it was the delivery of "Ensign?" that I found really poor... the expression of surprise was more like a valleygirl than a starfleet commander).
Fictitiously yours, Trent Roman