Apart from the extreme boundaries of the galaxy, I am not sure which places you are talking about. People have traveled across the galaxy in an Orca and a Type 9, just for giggles. If you wanted to argue that you travel in a straighter line when you have a longer jump range and therefore can make a "shorter" path between any 2 points, then you might be on to something in the more sparse regions. But that difference will be smaller the closer you are to the galactic plane or the center of the galaxy, where stars are much more densely packed.
There are certainly areas around the fringes where longer jump ranges can open up huge shortcuts - I'm on the outer edge of the Perseus arm at the moment, and to get to the New Outer Arm I could go straight across the Rift (if I had a >30Ly jump range, I don't) or take a 8 or 9KLy diversion around via where the star systems are more densely grouped.
But that's not really what I'm talking about. When you go a distance above/down below the galactic plane, the stars start to thin out dramatically (at NGC 7822 it gets very sparse, that's around 300Ly up, I'm now at NGC 281 which is 900 Ly down, and again it's very empty down there). Even with a reasonable 29Ly jump range, I've found many systems with just one reachable system in range - the one I just jumped from. There are probably many systems (and "features" such as nebulae) which simply aren't reachable without a big jump range.
Again, I'm not saying the DB shouldn't have a bigger fuel scoop, I'd love if it did - as long as it doesn't match/exceed the Asp. If you make a craft that matches the Asp's exploring ability, but with greater speed/manoeuvrability/combat ability then no one would buy the Asp. The only point I'm making is jump range is very important. I'd take a long jumper/slow scooper any day of the week instead of a fast scooper/short jumper. Of course ideally, I'd like a long scooper, and fast scooper.