"MC’s personality should be toned down bc most players didn’t enjoy it" - there's no way to know if this is true. People tend to comment more to complain rather than say "I like that x is like this", so I think the complainers are just vocal rather than necessarily representing a majority. If it was really such a big issue then people wouldn't buy the game at all.
Personally I like the MC so far! She's fun & isn't the typical FMC you usually see in otomes, she helps drive forward the story (several scenes wouldn't have happened at all if her personality wasn't like this), and she keeps Jayce on his toes. I liked that he called her a "handful" lol.
The creator is a solo indie dev, she's making the whole game by herself, so there's a lot of work put into this & it's a passion project. It's unrealistic and unsustainable (and a lot of pressure) to expect her to be able to cater to the audience's every whim, and I'm sure I speak for most people who bought the game that we trust her vision for it. So I hope people can accept her statement made in this post and be patient & wait for the next part of the game. There are so few games like this for a female audience (I don't know any 3D ones), and this one in particular is already so promising, so I really want it to do well.