I think the idea of only green is cool but from the player's point of view it is a waste not to have scenes with the other girls, perhaps he lacks a side character to accompany him on the adventure, it could be son of a human couple from the past who negligently had an absent father, the classic mother died of an illness and now the father must take charge, so we would have the opportunity to play with both of them, have two visions, even have different missions and with time to have scenes with the humans and the goblins without losing anything and without having NTR.
...
really now
see here
this game is based on and around a someone who digs green chicks. that's that. if you don't like it, maybe it's not suited for you.
furthermore there actually
is content with not greens. i'm not the only one who pointed to where to find that content. you can be ignorant about it, that won't change anything for everyone who enjoys this game for the sake of having a game about someone who especially prefers green chicks. it's called kink.
i've seen other kinks some people couldn't remotely imagine any human being to have.
each their own, but i
preferrably play this game here when i feel like playing a MC that likes Goblin girls. it's the main reason why i even checked it out in the first place. i play this one and enjoy it
when i feel like it. i've got tons of other games to suit my mood, whenever i feel like feeling different. if that all fails, i can still simply go outside.
due to real life filling about at least 85% of my day, i most of the time don't even play computer games. there are enough other things to do.
so
my players' point of view: all those non greens aren't main plot, and shouldn't really be.