EDIT : " I shake my head in disappointment at the FDL all the time " - Quoted for truth!!
I have two problems with the FDL, the "huge hardpoint" and the power plant size. It's simply too small, I find the FDL and Vulture too much of a compromise. I end up with empty utility mounts, and that's a waste. My Python is fully loaded and has power to spare.
I've never even considered re-buying an FDL. It looks nice and sounds nice, but I just didn't "want" to keep it.
I don't like the weapons choices for the huge hardpoint , the only gimballed one is the cannon, but because the ammo flies so slowly I find that unless I am point blank on something Asp size or above it's more than likely the target will simply turn a bit and I'll miss.
Great, I can fly rings around Anacondas - unless they've got turrets of course, which means they shoot me wherever I am anyway and renders the agility a bit pointless! If I want to go toe to toe with a big target then I want big shields. The Python has bigger shields than the FDL. Win.
Maybe it just doesn't suit my flying style, which is 100% FA ON ! I'm no Chuck Yeager
I guess I just prefer to tank it out a bit more.
Because I don't rate the cannon I always fit a large class three laser. Again , then, I might as well have the Python anyway, that has three large hardpoints and I'm back to the issue of more power than I can use, even with a full complement of A class shield boosters and cell banks, powering a bigger shield generator. I don't need it to handle like a Vulture... you can buy a Vulture for that
.... and I can take on pretty much anything the NPCs want to throw at me. It's still agile enough to get the smaller stuff too.
So instead of an FDL I'd have the Python every time, as long as it was A spec'd of course..
As a stepping stone then the FDL is part of the path to take to Eliteness... everyone should probably try one, but not if you want to do ANY trading, it doesn't have the space.
And it does come down to credits - only when you can afford to fully A spec both can you make a "final" decision. Until then you are using versions of the ship that aren't demonstrating their full potential. The A spec power plant on a Python costs as much as the FDL !! 51 million from memory... but with it the Python is my ship of choice. Without it maybe not so much. I'd get a Clipper instead of an FDL... half the price!