I don't know about the overdrive. I really like this idea, but as the boost is currently basically useless you would just always relegate the power to that different system. If it would be implemented this way, that ought to be accompanied by changes to the enemies, etc, to make the boost more useful. Then it would be a real decision between running around guns blazing or carefully ambushing enemies.
While cool, the tungsten rods would be really uneconomical in-universe. They provide no more explosive power than regular bombs/missiles (delivered via plane or missile) and cost a metric ton of money (tungsten is hella expensive), so in-universe they'd probably just use regular air to surface missiles (unless, for some reason, tungsten costs like 5 dollars per ton or something). At least, that's my opinion, but Mezz is always open to do what he wants, it's his game, and after all, the rule of cool is the only one that matters.