@Felthry The slowest fighting games I can think of that in any way benefited from their slowness is Bushido Blade 1 and 2 on the PlayStation. Those are slow, "realistic" swordfighting simulators where a single solid hit is a kill, so the slow speed adds a lot of interesting tension.
@connie this post was actually prompted by thinking about the fighting in dark souls and how it compares to like, smash or something
a fighting game with combat balanced similarly to dark souls would be interesting