Don't get me wrong. Gameplay in an H-game is good - but gameplay that ties the "game" and the "H" parts together more intricately is even better. In FF, to a degree - and certainly in a wealth of other H-games - they feel almost entirely divorced from one another - the sex is, for the most part, incidental. The game and plot could exist without it, with minimal adjustments. Personally I don't care too much about elements of the gameplay or plot that don't inform or directly interact with that aspect - it's not like I'm going to play any of these adult games outside of when I want to jerk off, cause there are games that do everything else they do much better.
None of this is to say having an interesting story or fun gameplay is a bad thing. But at least in my view, when they take such precedence over the adult content, I often think - why not just make a normal game and focus your efforts and resources there?
The bare minimum of a premise, setting, character, motivation, obstacles and antagonist(s), are often more than enough on their own, as long as the adult content is enough/good enough.
Stun > caught by enemy > animation with 2 loops and an end > resume normal gameplay is the minimum-viable for an action game. While I'd certainly like to see more games that expand on that basic formula or do something different - if the quality and/or quantity (or rather, density) of adult content is there, then I don't really mind either.
There's also the question of integration. For an action game - is the world, plot and story "told" rather than "shown" to me? Am I having my gameplay interrupted so I can sit or skip through pages worth of exposition, dialog and worldbuilding? Are these sequences moving the plot forward, or could they be largely ommitted with the player still having a good idea of what's going on, what their immediate goals and obstacles are?
