Give Space Pirates and Zombies a try. It's if Freelancer was made a top down game (in terms of play style) except not any trading. Lasers! Randomly generated galaxies! Hundreds of weapon upgrades! Multiple ships to control! Lasers! Lasers!
Not anywhere as tactical as FTL as it's real-time, but lots of cool ship designs. I think I paid around £3 or $3 for it during a Steam sale and put over 50 hours into it. And you can switch on the damage numbers so they fly off every enemy as you shoot them in a satisfying way.