In my career I totally omitted Asp Explorer and... from... Keelback I went to FDS. It showed me a different, unbeaten, non meta path. Anyways this ship can do everything besides exploring, but with Guardian boosters everything is possible.
FDS is very tough, tanky and very stable if you're into fixed weaponry such as railguns. FDS is quite drifty and heavy, but not as much as the the Cutter, nevertheless drift can be used as an advantage during sharp turns - just turn off the flight assist and decisively turn the stick towards desired direction, add some gas and then you can turn the fa on. If you're outmaneuvered by a Python while in FDS - simply you haven't touched flight assist button. In FDS you don't outmanuver other ships - you "OUTDRIFT" them. Flying FDS is like a driving a BMW 7 E32 with 100% locking slip differential
FDS is a pretty good medium miner. Can also haul 128 tonnes of cargo if you're into bgs or trading. Personally I'm using FDS with great success in bgs. If you want a combat version - just slap engineered hrp's all over and strap 5 multicannons and you're to ready to rock with 5000 points of hull and quickly recharging shield. Hardpoint placement is next to excellent, 4 mediums and one large and that is pretty close to fdl. Have you tried four railguns or plasma acc's on FDS? Try, she is very stable to do that. The best part when you boost on fa off and engaged yaw where you go into heavy yet very stable sideways drift thus allowing you to easily land hits with railguns. When compared to heavier dift machine - Cutter, FDS is much, much controllable, Cutter goes like brick out of control, so the only ship from drift junkies in Elite is FDS. Python and Crusader also have some drifting potential, but FDS simply provides more of that.