If you’re not familiar with the marketing or overblown hype for Phasma, her reduced role in the movie won’t mean anything to you. I was expecting/hoping for more from the character, but honestly when she showed up again towards the end I was like “oh yeah, forgot about her.” The truth is there are so many new and interesting characters here some were bound to get the short shrift.
I bet she had more screen time that was cut but honestly I think she was put there to establish a character who’ll get more screen time in later installments.