I really hope that by the end of this, I don't have to choose 1 girl. Choosing 1 girl to be the leader of the harem, sure, but not just one at the end.
Otherwise, I'll trust that the actual story will pick up and that we'll get at least one other area we can visit during this arc. Preferably two: the earth kingdom (Kuvira/Suyin/Earthqueen, yes they have different areas but there's a lot story wise that can be done), and Republic City (Kuvira final fight, plus Airbending training at the temple).
That being said, I definitely like that you can't miss any scenes. This is a porn game, I don't see the benefit of being mid stroke then having to stop while I consider what direction to go. Having mini games to block progression is a fine way to add challenge. Specifically I don't see why a porn game should have you missing content, and why a developer would spend time making content you could miss.
Not that the game should have no challenge. But without a walkthrough, I like to know that I won't miss content. And I like that the options are labeled in terms of what you get to see (like Katara old vs young).