Here's a scenario a coach presented where you need to come up with a way to do setter training on a half court with some constraints.
Remember that player reactions start with properly reading the visual cues, so it makes the most sense to include those cues in training, not remove them.
You can use process scoring rather than more standard outcome based scoring to continue your development work in training games.
While making detailed long-term coaching plans for a season is impractical, it definitely makes sense to have things you're working toward developmentally.
As a covering coach I ran three shortish practice sessions for a group of 15-and-under girls. Here are the plans I used for those three sessions.
Playing space has a meaningful influence on the sorts of training effects you can expect to get from your games and drills. Use it wisely.
Players love winners style games, and for good reason. We coaches should love them too as they offer us opportunities to work on lots of different things.
Are you working on out-of-system play enough in your practices? By that I mean does that work match the amount of time you're out-of-system when playing?