I didn't say that the MC should not be involved, it could just be a threesome or a party involving MC too, where at some point Amy, or Meg or Sam take the chance and fuck one of the girls in tandem with the MC or right next to him while he is busy with another girl. But if there was some scene without MC directly involved I'd say why not? The point is that after playing a moltitude of games/VNs, many tend to be boring and kinda fall along the same schemes. I find Lunar's Chosen enjoyable also because of the unusual story. That said, the game is already great, but why should one not feel free to experiment shifting the point of view between more characters?
If the creator had to create two completely different storylines for every optional futa character, then link all together and try to make sense out of it... it would be an hell to develop a game like that, and maybe in time developement difficulty is a factor that favors game abandonment. Instead we get regular and consistent updates. What could we want more?
Well those scenes are already in the game, Meg and sister+ Mc, Serena and others with MC, birthday party, Amy and Claire with MC and a few more. Like you already said the game is already pretty good, so what would a change of focus to the girls help with except make it feel like a game where MC is unimportant. (I remember one male Mc game where I think in update 5 we had a load of lesbian scenes and MC still had to have some action, well by then I was gone. Girls were pretty but why would I play an Mc in a male MC game that can only fap, or a female Mc in a female MC that only fingers herself watching guys fuck eachother

) Remember all girls have their fans and people will want to see them star, there just would be no time for Mc anymore since there are way more girls as MC's in this game, because the simple truth is those scenes would come instead of MC scenes, not as an extra. Now will it never happen? Who knows PT might at some stage decide it is so important for the story so it makes sense to have just a two or three or even 4 girls scene without MC.
Just as it makes sense that Amy will mainly have a cock until end of game unless PT has the processing power to make two scenes for her for rest of game and divergent story lines, even if I personally might have preferred the treatment had been definitive. Just it makes sense within the game it is not so.

Most devs here are amateurs and not big studios, that also means they just can not always keep in mind all of our preferences or let it go as we wish or offer a choice and options without a price. In my eyes, but that is just my opinion is that games that offer too many choices lose focus, have ridiculous characters that have no personality or character at all and/or insane long time between updates, my two signature games being a point in case for that last. I love those devs ambition, but it def has a price.

My opinion.