Fallen Seraph said:
Or simply as people have stated before, Martial Daily Powers are sooo difficult to set up, and follow through with that the probability of being able to do so is only once per-day.
I have to admit that I find these types of power rationals (or explanations) somewhat amusing.
It's nearly impossible to rationalize game mechanic derived from other game mechanics. A daily is a game mechanic solely introduced as a big gun ability balanced by a limited frequency, nothing more. It's pure game mechanics. Trying to make sense of it (for the entire gaming population) is difficult or impossible because it is not a model of the fantasy world. It is a model of the game mechanics.
When one models from the vision of the fantasy world, then it's easier to rationalize or explain the rules derived thereof and more people will typically buy into it.
When one models from the game mechanics (like with daily or per encounter powers), then it's often difficult to rationalize and one person's rationalization will not satisfy another person (and by difficult, I mean difficult to come up with an explanation which just makes sense for most everyone).
People have been putting up all kinds of rationals, some better, some worse, for some of the (specifically Warlord daily) martial powers. But, having ammunition of martial abilities just does not make real sense and never will.
Ammunition is for guns, not for 6 to 60 seconds abilities that people can do, but only once per day (or once per 10 minutes). That's because dailies are a game mechanic for balance reasons, not for common sense modeling of the fantasy world reasons. There is no fantasy rational for them that makes real sense for their frequency and even some of the more reasonable rationals will not satisfy everyone because by the very fact that they are couple of seconds or minutes once per day, they are artificial.
Granted, divine powers can make some sense as dailies because the Gods only permit one per day (in a "the deities control resources" fantasy model), but this is a bit forced as well.
Arcane makes even less sense (but one could still extrapolate an arcane exhaution of capability model), but martial makes no sense. And yes, I realize someone will throw out a rational like your probability concept, but these types of rationals are still totally artificial and lacking. They are an "after the game mechanic is designed" attempt at rationalization, not a "the game mechanic including frequency is modeled from the original reason for the power". Anytime it is done in this backwards order, there are going to be people who have an issue with the explanation.
Game mechanics like these are awkward because they reinforce the fact that someone is playing a game (i.e. they disrupt suspension of disbelief for some people).