If I were to start the game over again it would definitely be a female protagonist game about Niki. It's a little late for it now though. I have been thinking about putting some Niki choices in it though and making it multiple protagonist. It's something I'm really considering.
As a counter to the other opinions, I quite like the game as it currently is. I don't mind if a game focuses more on the story of (one of) the LIs, as long as I have a male MC to identify with, and that male MC is the focus for all the LIs. If the game really did go multiple protagonist or female protagonist and I was making decisions for Niki instead of the MC, I would not be interested in the game, and would not play it. It's not about me not liking Niki (I very much do), and it's not even about who the story focus is on. For me, it's about who the
decision-making focus is.
(The other factor is that in female protag games, most of the time the girl is fucking multiple guys, which I am 100% not interested in seeing in any way.)