The bat has a mesh issue where you can’t hit objects or players if they’re too close to you(generally misses deployable objects on every occasion, which has gotten me killed a few times), and the Kukri just has bad range on a light attack, so you have to crouch to hit downed players most of the time. The Beckhill is a good all-around melee and does a satisfactory amount of damage compared to the Stilletto(which only took 2/3 of a Skyhammer’s health with 5 light hits last time I tried it). I sometimes have trouble with the Katana’s range because the animation doesn’t seem to correspond with the damage arc, so it’ll seem like I should hit someone but they’ll be just out of range.
Melee weapons in general are pretty viable in CQC, although the Stilletto isn’t great except for a last-ditch bum rush when you run out of ammo.