As long as you're making progress, you'll eventually get there. Even when you're deleting stuff, you are learning, moving closer to writing something that is worth keeping.
If you ever feel bad about not being fast enough, remember that people like George Martin and Patrick Rothfuss exist - both unable and unwilling to finish their stories after more than a decade of zero progress.
In regard to lewd scenes, obviously I'd pick as many as possible - NOT! As much as possible, yes. As many as possible, no. Yes, I said that twice.
It's a flaw in many harem games that as you progress, the story can't develop properly because there are so many girls, each of them having a sex scene every few minutes. So instead of the story steadily ramping up in pace and tension, it peters out into a slow, constantly interrupted trickle. That's unsatisfying when most of the early game was full of story developments. The issue is further exascerbated by the player's... physical limitations for the number of lewd scenes they can enjoy in one sitting, leading them to stop reading to preserve the scenes when they're still interested in more story. It's better to have fewer scenes, but for those to be longer and better fleshed out.
TL;DR: Not necessarily more scenes, but longer, harder, deeper ones.