Yeah GA: TD was pretty ho-hum to be honest. The Saturn had no shortage of fighting games and pretty much always had the best ports of the big hitters already. If you were a GA fan, you would be disappointed, if you weren't you'd play something else.
GA 3 is much better than most people give it credit for: the graphics and music are top notch, the extra moves are cool and it's a worthy sequel; just needed a bit of a balancing pass because the pacing is a little slow.
Yeah Outrunners got a MD port, but let's be real, no chance the MD could have pulled it off properly. If at the very least they didn't force the split screen it would be passable, but such as it is? terrible. You'd have a better time playing classic Outrun on the machine.