Also a possible use of a story point: stop fleets from supporting one another for 1 fight? (A brilliant feint allows you to ambush one fleet alone.)
Hmm, this is really interesting. I feel like I'm still coming to grips with story points a bit, as far as what is and isn't a good idea and why. My concern with this is that it could make challenging encounters too easy - it's sort of... possibly letting the player story-point some of the fun out of the game? Where, say, spending a story point to disengage without a pursuit, while on the surface similar, doesn't do that - rather, it saves the player from reloading and/or an escape sequence that could be a drag.
So, again, not a thing I feel certain of, and will keep this idea in mind, as conceptually it's very cool. Thoughts welcome!
(More on-topic, I'm not actually sure whether this would be good or not. I mean, more info is good, usually, but encouraging the player to super precisely piece apart enemy fleets like this seems like it might be... not great. Plus, the logic for whether to join is a bit complicated, so it's not that straightforward to determine who would actually join before the actual encounter.)