We've already had mods that allowed for this; there's nothing wrong with the concept of generating some fuel through various actions, per se. I think that, long-term, the Outposts will largely make this issue moot; if you have a region where you're constantly traveling between the Core Worlds and the Rim... you'll build an Outpost, eventually, just to cut down costs. Right now, Fuel is largely a one-shot resource that we're spending speculatively, in small amounts, early, until it's time to do big Bounties late-game.