I have a feeling that it *WILL* be all about the battles or at least some sort of 60%/20%/20% split between Combat, Exploration, and Other.

The plot of the universe as written is a Federation/Klingon shooting war with the odd "inscrutable threat" (Romulans/Borg/8472 etc) I seriously doubt the designers will change the setting (and the war itself is part of the setting) in any meaningful way by the players.

Maybe they'll suprise us and have something revolutionary in the explorer system, but to get an audience you need to lead off with the Explosions and Phasers.