well, instant action should become more exciting with beta3 and the coming betas..
as Fleet Operations was planed as a multiplayer mod, we had no plans of a campaign.. but we play with the thought to make one for the final release.. but that's NOT sure yet, so don't point on me

the possibilities of armada single player editing is very limited and we have to develope the stuff ourselves

about the betas:
well, there will be at least beta 3 and 4 before the final release.. possibly a 5th one, but that depends all on the progress we will make