Personally I have my reservations about these technologies, but I will not go into details, since it does not apply and I will focus on answering your question.
The dialogues are too short to be able to draw conclusions, the problem with computer generated voices is the acting, usually the intonations do not convey the correct feeling.
3 or 5 lines of a few words, are too few examples to realize if the performance enriches the dialogues or not. The best thing is that instead of a 4 minute video with only a few seconds of voice, you create a video dedicated solely to voice narration, preferably in different situations.
Currently, what you have doesn't seem bad, but I really wouldn't play it, because starting to hear the voice, then stopping after the second or third word, has always bothered me, you don't know if it's a mistake, if you should read, or if you must listen and in that process, you lose focus on the game and the story.
EDIT:
"We wanted to know what you thought about AI voiceover"
The previous person has given you feedback, and instead of analyzing the actual effect it might have on a target audience, you go on the offensive.
My advice, if you are looking for opinions, you have to learn to read the good and bad opinions and learn from them.
I recommend that you give a read to this thread that talks a bit about how to "filter" the feedback.
https://itch.io/t/2570482/gamedev-tips-for-2023
EDIT2:
It does not matter if the voice is generated by a computer or if it is a real actor, it is best that you always give the option to turn them off.
Personally, I would like the game to indicate if it uses an AI generated voice, but this is a personal opinion, I couldn't tell you if objectively, it is better or worse.